Specifications Bluetooth2.1+EDR FM/TF card/Aux in Handsfree NFC Headphone output Hot sale wireless portable rectangle rotating mini bluetooth speaker Features and function 1.Bluetooth version:2.1+EDR2.Handsfree calls3.FM Radio4.Aux in5.Headphone output6.TF card reader function7.2.1 CH L/R stereo passive speaker,S-BASS technology,good sound quality.8.USB charging9.Built-in rechargeable Li-battery10.NFC induction pairing function Technical Specification Speaker size:1.5 inch(40mm) Impedance :4Ω Power : 3Wx2 R.M.S: 2Wx2 &nbs
Specifications Best Mobile Partner Bluetooth Bracelet * Caller ID & Watch display * Answer,Reject Phone call& BT function * Anti lost Funct. 2012 Best Mobile Partner Bluetooth Bracelet with Vibrating.Caller ID &time display for Iphone. Samsung. & Android system mobiles Bluetooth bracelet Key features:1. Built in Speaker & Microphone (Update from the old model BW-13)
Specifications 1.High Quality 2.Cheap Price 3.Fast Delivery 4.no MOQ 5.Nice Sale Service Cheap Price Square USB 2.402 GHz - 2.480 GHz V4.0 Bluetooth Adapter (Black) FeaturesStable performanceBluetooth 2.1 + EDR, Bluetooth 3.0 + HS and Bluetooth 4.0 LE Supports network, dial-up Internet access, fax, LAN access, headphones, wireless networkLow power consumptionDual-mode BluetoothConvenient and easy to useGeneral SpecsBluetooth Bluetooth 2.1 + EDR, Bluetooth 3.0 + HS and Bluetooth 4.0 LEOSWindows 98, 98 seme, 2000, XP, Windows 7InterfaceUSBSpeed3.5 bitsReceive/ Transmit Range20 metersBand2.402 GHz - 2.480 GHzSensitivity -86dBm @ 0.1%RF Transmission Power +6 dBmPackage Details
Place of Origin: Guangdong China (Mainland) Brand Name: OEM Model Number: BT011 Packaging & Delivery Packaging Detail: Blister packing 200pcs/ctn, ctn size: 46x46.5x22c m; GW/NW: 12.5/10kg Delivery Detail: 1-3 days for samples , 6-10 days for large orders Specifications 1.USB bluetooth adapter/USB bluetooth adaptor/USB bluetooth dongle 2.Competitive prices 3.Accept small order 4.Fast delivery 1.USB bluetooth adapter/USB bluetooth adaptor/USB bluetooth dongle2.V1.2 Class23.Supporting profiles: networking,Dial-up, Fax, LANaccess, and Headset.4.Operation system: Windows 98, 98se,me,2000, XP,Vista5.Interface: USB compliance6.Symbol rate: 3M bps7.Receiving/Sending range: 0-100m
Specifications JINOU Walkie Talkie Bluetooth Adapter can make the intercom carried with bluetooth function. JINOU Walkie Talkie Bluetooth Adapter can make the intercom carried with Bluetooth function. And it can pair with cell phones to reach the goal that liberating your hands and calling freely through using the Bluetooth headsets. You can connected the Bluetooth headset with any Bluetooth mobile phones (which support its specification or the specification of Bluetooth hands-free ) & audio equipments and using together with Bluetooth Intercom Adapter. The valid range of the device is 10 meters. You needn’t operate manually and Language Control Systemof anti-interference. Besides, the Bluetooth headset will connect with the Walkie Talkie incessantly in round 10 meters and reconnect the circuit design automatically to ensure connection signal not interrupt. What’s more, this product is the solution which subscribers are looking for a long time.It is operated simply and
Place of Origin: Guangdong China (Mainland) Brand Name: XYY Model Number: XYY-024 Usage: Mobile Phone Output Type: AC Connection: Plug In Color: black Input voltage: 100---240V Output voltage: 24Vmax Output current: 4Amax Housing size(mm): 85*45*40 Socket type: for E.U. Packaging & Delivery Packaging Detail: inner package:polybag,blister card,white box outer package:carton Delivery Detail: samples within 3 days,15 days for bulk orders Specifications bluetooth tablet adapter: 1.24 months warranty 2.over current,short-circuit protection 3.100% full-load burning test 24Vmax 4Amax 24Wmax dual color led light bluetooth tablet adapter colorblackinput voltage100-240voutput voltage24Vmaxoutput current4Amaxhousing size85*45*40socket typefor E.U. Quality control:1.full inspection: 1.Plug-in board inspection: to make sure no components in wrong place, no reverse components, no components left, etc. 2.Semi-finished products full inspection: to make su
Specifications Siemens S7-200PLC the Bluetooth communication suite,use Bluetooth wireless communication substitute traditional PC/PPI cable. Bluetooth is a short-range wireless communication technologies, working in 2.4 GHz of the ISM band, the band Green free band of the genus, use the band the radio resource management departments to apply for license. Bluetooth has adopted a frequency hopping spread spectrum in the way, have good shielding, entered industrial control areas, more and more applications in industrial automation, distributed data acquisition, intelligent transport, electricity, hydraulics, and many other industries, industrial control interface implemented as RS232/RS485/RS422 transparent wireless transmission of signals. Siemens S7-200 series PLC Bluetooth communication suite FS-BT-PPI (FS is a registered trademark of the FourStar electronic FOURSTAR ), it is FourSta
Specifications 1.Bluetooth specification V2.0 & V1.2 Compliant 2.Support profiles: Networking, Dial-up, Fax, LAN access, and Headset Description :Mini USB 2.0 EDR Dongle Wireless V2.0 Bluetooth Adapter FeaturesPlug and play, no driver needed Compact and tiny, measures 0.75'' x 0.5',' weights only 0.3Oz Connect to Bluetooth devices such as mobile phones , PDA or PC , for data transfer, networking, and dial-up , fax etc Enabled wireless connection to Bluetooth headset Supporting Bluetooth voice data Supporting multi languages SpecificationsBluetooth specification V 2.0 & V 1.2 Compliant. I/O Interface: USB compliance. Supporting profiles: networking, Dial-up, Fax, LAN access , and Headset. Receiving / Sending rang : 0-100m Data rate: up to 3Mbps. Input Power: DC 5V (USB Power). Weight: 8g Compatible WithWindows 98, 98SE, ME, 2000, XP, VISTA, Win 7. NOTE:a.Import duties,taxes and charges are not included in the item price or shipping charges.These char
Type: Tablet PC Products Status: Stock Screen Size: 7" Processor Manufacture: AllWinner Processor Type: A10 Cortex A8 1.2 GHz Processor Main Frequency: 1.2GHz Hard Drive Capacity: 8GB Memory Capacity: 512MB Touch Screen Type: Capacitive Screen Display resolution: 1024x600 Battery Life: 5-10h Feature: Bluetooth,Wifi,3G,Webcams,Multi Touch,HDMI,G Sensor,Camera,Phone Call Operating System: Android 4.0 Weight: 328g Place of Origin: Guangdong China (Mainland) Brand Name: OEM/ODM/Julong Model Number: M726 Battery: 3.7V/3000mA OS: Google Android 4.0 Picture formats: JPG, GIF, BMP, PNG WIFI/3G: Support Camera: Front camera 0.3MP, Rear camera 2.0MP G-sensor: Support Microphone: Internal Dimension: 193*120*8.9MM Warranty: One year for whole device, battery for half a year Language: support Multi-language Packaging & Delivery Packaging Detail: Each tablet pc packed in each gift box, 10/20 boxes in per carton. Delivery Detail: within 20 working days Specifications 1.Bluetooth adapter for and
Specifications 1.Bluetooth 3.0+EDR 2.Include Onboard the magic stick 3.Using Magnetic Speaker 4.Bluetooth Adapter for Speakers Active Speakers SPEAKER DIM 40mmPOWER1.5WSPEAKER IMPEDANCE3.6±10%SPEAKER FREQUENCY RANGE200~20KHzOUTPUT S.P.L81±3db*3w/30mmMIC.DIMENSION4.5*2.2MIC.SENSITIVITY-54dB±2dBMIC. IMPEDANCE2.2WIRELESS SOLUTIONBLUETOOTH V. 3.0+EDR SUPPORT: HSP, HFP, A2DP and AVRCPOPERATING RANGE10 METERS(33fts) CLASS II
Products Status: Stock Brand Name: PCI Model Number: BT-Micro4 Place of Origin: China (Mainland) Specifications BT-Micro4 is the smallest and lightest Bluetooth 4.0 + EDR/LE (Low Energy Features) adapter with the latest standard. BT-Micro4 is Bluetooth Standard 4.0 compliant + EDR/LE which improves power consumption and compliant with bluetooth verison 3.0 and 2.1BT-Micro4 installation is as easy as a plug-in. And the software included provides a friendly users interface. It allows an operating range of up to 10 meters.
Brand Name: I-wave Model Number: PC037 Place of Origin: Guangdong China (Mainland) color: black Packaging & Delivery Packaging Detail: stardand package Delivery Detail: within 3 working days Specifications it is a stereo bluetooth receiver especially designed for Ipod dock station fashinable bluetooth music recevier high quality bluetooth music receiver 1. I -WAVE is a stereo bluetooth receiver especially designed for Ipod dock station 2.plug this receiver into ipod dock station, the music will be transmitted to dock station from your ipod, MP3/MP4 player and mobile phone which have bluetooth stereo function. 3.it is fuuly plug and play and it does not need extra power. specification: 1.bluetooth version: bluetooth V2.1+EDR, class 2 2.bluetooth profiles: A2DP&AVRCP 3.bluetooth frequancy range: 2.4GHz~2,4835GHz 4.effective range: 10 metres Feature:Easy to use by connecting directly 30-pin dock to change the common sound-box to
Specifications Wireless bluetooth music receiver adapter for iphone 1.High speed 2.Transmits up to 10 meters 3.enjoyable Technical Specification: 1.Bluetooth version: Bluetooth V2.1 + EDR, Class 2 2.Bluetooth profiles: A2DP & AVRCP 3.Bluetooth frequency range: 2.4 Ghz- 2.4835Ghz 4.Powered from 30-pin dock 5.Transmission distance: not less than 10 meters 5.Dimension:43.5 * 35.5 * 7 mm Introduction:1. This is a stereo Bluetooth receiver especially designed for iPod dock station. 2. Plug this receiver into iPod dock station,the music will be transmitted to dock station from your iPod,MP3 player and mobile phone which have Bluetooth stereo function. 3.It is fully plug&play and it does not need extra power.
Specifications Wireless Adapter Intel Wi-Fi Link 4965AGN 1.100% Brand new and original 2.802.11b/g/n Wi-Fi 3.Bluetooth 4.0 Wireless Adapter Intel Wi-Fi Link 4965AGN The Intel Wireless Wi-Fi Link 4965AGN is an embedded 802.11a/b/g/Draft-N PCIe Mini Card network adapter that operates in both the 2.4 GHz and 5.0 GHz spectra.It delivers high throughput and a host of features that enhance today's mobile lifestyle. Features• Up to 5X faster and 2X greater range• IEEE 802.11a/b/g and Draft-N quad-mode• Advanced security via 802.11i• Wireless support for Intel Active Management Technology• Business-Class Wireless Suite (v2): High-Density Networking• Support for Cisco Compatible Extensions v4• Easy-to-use Intel PROSet v11.1 WLAN Software• Intel Connect with Centrino program• Friendly Neighbor Assurance Dimensions (H x W x D) 2.00 in x 1.18 in x 0.13 in (50.95 mm x 30.00 mm x 3.30 mm)Weight 7.2g DiversityOn-board diversity suppor
Place of Origin: Guangdong China (Mainland) Brand Name: Netural Model Number: SM-BA01 Specail feature: Wireless, Portable, Mini Bluetooth rate: 2.402-2.480GHZ Maximum power transfer: grade2,4DBM Receiving sensitivity: 85DBM Transmission range: 10M Transfer rate: 115200BPS Active power: <55MA Sleep mode: <10MA Battery capacity: 180MAH Product size: 62*28*13MM Packaging & Delivery Packaging Detail: gift box:108*70*30 Delivery Detail: 1-2workdays for sample,3-5days for 100pcs Specifications 1.Bluetooth Stereo Audio Adapter 2.Transmission range 10M 3.Continuous use time:5 hrs 4.Use for iPhone/iPad/TV 5.3.5mm jack Portable Stereo Bluetooth AdapterTraveling Mini Bluetooth Wireless Speaker home StereoStereo Bluetooth Transmitter Audio Home StereoPortable car audio bluetooth adapter Nowadays more and more tablet PCs, smart phones, notebooks come into market. These powerful products are multi functional such as play music, play games, play
Place of Origin: Guangdong China (Mainland) Brand Name: UNIWAYPO Model Number: UWP-12W-XXXX Usage: Mobile Phone Output Type: DC Connection: Plug In Packaging & Delivery Packaging Detail: PE bag + small white box+Carton box Delivery Detail: 20 working days Specifications 12W universal travel adapter usb bluetooth adapter for android tablet clients:Yamaha,Sharp,Hitachi 2 years warranty 12W universal travel adapter usb bluetooth adapter for android tablet INPUT/OUTPUT SPECIFICATIONS:Input Voltage:AC 100V-240V,50/60HzRange Voltage:AC 90V-130V,47/63HzOutput Power:3-5WOutput Voltage:3V-12VOutput Current:0.25A-1AOver Current Protection:120% MinOver Voltage Protection:150% MinShort Protection:Auto RecoveryLoad Regulation:±5%GENERAL SPECIFICATIONS:Operating Temperature:0 ~ 40°COperating Relative Humidity:5 ~ 95%RHStorage Temperature:-20 ~ 85 °CWithstanding Voltage:AC 3000V/Min (between Input & Output),10mA(Max.)Insulation Resistance:DC500V 100MΩ(Min.) (
Place of Origin: Guangdong China (Mainland) Brand Name: LEDMATE Model Number: yagi antenna Item: yagi antenna Frequency Range: 806~960MHz Gain: 8dBi VSWR: â¤1.5:1 Maximum Input Power: 50W Connector: N-K Radome Material: Aluminum Lightning Protection: Direct Ground Dimension: 410*190*75mm Weight: 0.4KG Packaging & Delivery Packaging Detail: By air or express is carton box with PVC By sea is wooden box with PVC Delivery Detail: 10-25 working days after deposit. Specifications usb bluetooth adapter with antenna 1.806~960MHz 2.Gain 8dBi 3.VSWR<1.5 4. Dimensions 1330(mm) LEDMATE Outdoor 8dBi Yagi Antenna usb bluetooth adapter with antenna Application: -CDMA800/GSM900-Application of band 800~960 &
Specifications universal travel adapter with usb charger 1.Customize ,Logo printing 2.new 100% 3.CE, ROHS, UL.. 4.Competitive price universal travel adapter with usb charger,universal travel adapter with usb charger ce&rohs manufacturers&suppliers&exporters Factory Direct Sale=Superior Quality+Best Price Description of the universal travel adapter: If you are an international traveler, this universal power adapter is a MUST HAVE. PROBLEM:You travel to a different country and now you can't plug in any of your devices because the wall outlets are different shape... SOLUTION: Plug your cord into this adapter and switch to the shape you need. That odd shape port has all the appropriate holes to fit USA plugs, European plugs, Australian plugs, UK plugs. All of the wall outlet plugs are hidden within the device (
Specifications Newest Bluetooth Adapter Newest Bluetooth Adapter Product Description:General RadioBluetooth Class 2, 20 meters (in open space) Carrier Frequency : 2.4 ~ 2.483GHzData Rate : 1 Mbps (The maximum operating range depends on the environmental factors.) Bluetooth StandardBluetooth v 1.2 & 1.1 Spread SpectrumFHSS (Frequency Hopping Spread Spectrum) Modulation MethodGFSK (Gaussian Frequency Shift Keying) I/O Interface USB v1.1 Input PowerDC 5V, USB Power Sensitivity< 0.1% BER at -80 dBm RF Output Power0 dBm (typical) System SupportWindows XP/2000/ME/98SE(The product is driven by the bundled IVT BlueSoleil Bluetooth software or Windows XP SP2 Bluetooth stack) Dimensions59.0 * 24.0 * 14.0 mm LED IndicatorSingle LED Advantage FunctionsSerial Port ProfileDial Up Networking ProfileFile Transfer ProfileHuman Interface Device ProfileHardcopy Cable Replacement
Specifications 1.t android dongle support miracast 2. support DLNA Microcast Airplay 3. share media file from cellphone tablet pc,laptop New digital products Visson V5 mirror display displayer mirror display on TV What is V5 WIFI display dongle:It enables wireless delivery of streaming or local HD movie/picture/screenfrom windows pc, tablets, iPad, mobile phones, etc to normal TV set.
Place of Origin: Guangdong China (Mainland) Brand Name: Tunersys,Zigbee wireless gateway bluetooth adapter from China Tunersys Model Number: SC1 Format: Firewall, QoS, VPN Style: Zigbee wireless gateway Screen: Yes Connect: WIFI Support: switch controller Operation: IR remote control Type: Wireless gateway Certification: 3c WAN Ports: 1 Packaging & Delivery Packaging Detail: By carton, 480 Pieces/CT,64.5*34.5*33.3cm Delivery Detail: 15-25 days after recieved payment Specifications bluetooth adapter 1.Compatible with IEEE 802.15.4 protocol 2.Access by TCP/IP 3.As zigbee coordinato Zigbee wireless gateway bluetooth adapter from China Tunersys SC1 wireless gateway is based on zigbee network technology. It provides standard Ethernet interface and can connect zigbee network to the LAN or Internet. It’s convenient for users to detect and control zigbee sensor or controller through mobile phone,panel computer,PC or other mobil
Place of Origin: Guangdong China (Mainland) Brand Name: OEM Model Number: GTMR007 Usage: Laptop Output Type: DC Connection: Plug In Interface: Standard USB interface Packaging & Delivery Packaging Detail: neutral packing or customized packing Delivery Detail: 15 days after receipt of the deposit Specifications usb bluetooth adapter for android tablet Complies with Bluetooth 2.0,Standard USB interface,powered from USB interface speakers usb bluetooth adapter for android tablet Bluetooth Music ReceiverTO play music of iPad, iPhone, Mobile Phones, Tablet PC or Any Bluetooth Device on our Mini Speaker / Home Audio System wirelessly. The Audio signal is transmitted through Bluetooth to this Device. This Device is connected to Mini Speaker / Home Audio. This gives the FREEDOM of listening your MUSIC LOUDLY from your Mobile Device without clutters of wires.OPERATING INSTRUCTIONS:Use the Bluetooth USB insert to the speaker.Enable the Bluetooth function for the devices such as iPad
Place of Origin: Guangdong China (Mainland) Usage: Mobile Phone,cell phone ,charger ,case color: black ,white Compatible: with apply device ,Android style: classic and elegent style Packaging & Delivery Packaging Detail: each into crystal package ,size :20.6 x 15.2 x 5.2 cm Delivery Detail: 7 days after the payment is completed Specifications bluetooth adapter 1.make your andriod cell phone into 3 cell phones. 2.enable your Android tablet 2 SIM phone call function slim SIM Bluetooth adapter for Android tablet Specifications1)Three SIM Card Standby for your Android cell phone2) make your Android tablet have 2 SIM card phone call function . 3)Bluetooth V2.1+EDR 4)Mini, Protable 5)Color Option Features:1)Three Card tandby2)Bluetooth 2.1+EDR3)Text message4)phone call 5)Internet 2.75G Glass 126)Bluetooth Seamless docking7)Call, to electric, SMS push without delay8)900mAh lithium polymer battery9)Signal stats prompt 3 color lights10)All IOS, Android sytem compatibale(T
Specifications 1 bluetooth adapter with engraved design 2 Australia adaptervailble for 150 counties 3 CE&ROHS 2012 High quality bluetooth adapter for business travellers NT680 bluetooth adapter NT680 This Interchangable Plug Adapter for men sold well on Europe/USA/USA Market Spin Design With L universal travel adaptors for business travellers NT680 ongRich Patent Protection Product Size:65*55*55mm Available Color:White/Black/Green,OEM Color is available if qty reach 3K Housing material:Fire retardant 100% NEW Raw PC (Fire rating UL94-V0) Metal material:Full copper with 3μ nickel plating protect plug against Oxidatio Female Socket:Universal Type can accept different countries pl
Specifications USB Bluetooth Dongle,bluetooth adapter Supporting voice data transfer Support for 802.11 Coexistence Support Windows 7 Plug&play USB 4.0 Bluetooth CSR 4.0 Dongle Support Voice Data Class I Specifications Mini Bluetooth USB dongle 1.USB Version: 2.0/3.0 2.Bluetooth Version: 4.0 2.Factory price, high qualityFeatures:· Compliant with Bluetooth v4.0 · Software:IVT7.0 · Supporting Profiles:Networking,Dial-up,Fax,LAN Access and Headset .· Operating System:Windows 98/98 SE/ME/2000/XP/Vista /WIN7/WIN8· Interface;USB Compliance· Receiving / Sending range:0-20m · Supporting Bluetooth vioce data · Supporting Multi languages· Ture plug & PlayPackage:1x Plug&play 4.0 Bluetooth CSR 4.0 Dongle Warranty:One year high quality guarantee.We will replace or repair all the defective products during&nbs
Products Status: Stock Brand Name: OEM Model Number: SL-1029 Place of Origin: Guangdong China (Mainland) Available package: opp/blister card Packaging & Delivery Packaging Detail: blister card or opp Delivery Detail: 2-3days Specifications Mini Bluetooth USB Bluetooth Dongle Wireless Adapter 1.USB interface 2.Wireless Adapter 3.USB 2.0 4.Easy to use Mini Bluetooth USB Bluetooth Dongle Wireless Adapter Features: 1.Adds Bluetooth capability to your PC/laptop through the widely available USB port. Such as mobile phones, PDA or PC, for data transfer 2. Supporting profiles: Networking, Dial-up, Fax, LAN access, and Headset 3.Connector : USB compliance 4.Symbol rate: 3 Mbps 5.Receiving/Sending range: 0-100m 6.Convert non Bluetooth PC into Bluetooth enabled 7.Mini and Compact ,easy to use and storage
Specifications 1 high quality usb bluetooth adapter for android tablet 2.1m 5V-1A cable 3.Hotsync data transfer and charging high quality usb bluetooth adapter for android tablet for iphone5 mobile phone Model: SJX-004Speicification: high powered usb bluetooth adapter for android tablet With 1M cable for 5V-1A materialPacking: 20pcs/poly bag or to customer’s requirementsFeature: hot sync data transfer and charger 8 pin USB date charger cable Beautiful and light, also convenient to carry with.Reliable and fast data transferSupports USB 1.1 and 2.0 for maximum transfer ratemany color items are available Warranty All the products we sell come with 1 year warranty. We provide full after-sales service to our whole sale customers and dropshippers. Warranty benefits apply equally to wholesaler orders and dropshipper single item orders Our Product Range Introduction t
Specifications csr v2.0 bluetooth usb dongle adapter 1.Short Circuit Protection 2.Over Current Protection 3.Over Voltage Protection csr v2.0 bluetooth usb dongle adapter1 Product characteristicsInput: 100-240V 50/60HZ(47/63HZ) Output power: 60W Output voltage: 12V Output current: 0.1-5A Line regulation: ±1% Load rang: ±5% Dielectric Strength test: AC 3000V /5MA Insulation resistance: DC 500V /100MΩ Energy efficiency Level 5 Energy Star (V 2.0) Size: 97*45*35(mm)csr v2.0 bluetooth usb dongle adapter2 Safety compliance standardsCUL,UL (ITE UL60950 )TUV/GS(ITE EN60950 )CE, CB,VDE,UL,FCC,CCC(ITE GB4943)SAA,PSE,KCcsr v2.0 bluetooth usb dongle adapter3 Output characteristic:3.1 Static Output Characteristics R+N: 120mVP-P Ripple & Noise: Measurement is done by 20MHz bandwidth oscilloscope and the output paralleled a 0.1uF ceramic capacitor and a 10uF electrolysis capacitor. Test under the condition of r
Specifications Driveless Micro Bluetooth USB Dongle (Adapter) With CSR Chip,Plug & Play Convert non Bluetooth PC into Bluetooth enabled. 2)Wireless connects to Bluetooth devices such as mobile phones, PDA or PC, for data transfer, networking, and dial-up, fax. 3)Enabled wireless connection to Bluetooth headset. 4)Supporting Bluetooth voice data 5)Supporting Multi languages 6)Supporting profiles: networking, Dial-up, Fax, LAN access, and Headset. 7)Operation system: Windows 98, 98se, me, 2000, XP, Vista 8)Interface: USB compliance. 9)Symbol rate: 3 Mbps 10)Receiving/Sending range: 0-100m 11) Compatible with Windows 9X /ME /NT /2000 /XP /Vista /Windows 7 OEM are Welcome! we can print customer's artwork and logo