Stereo Wireless Bluetooth Headphone

Brand Name: OEM Model Number: L2 Style: Neckband Communication: Wireless Connectors: bluetooth Use: mobile, PC, etc. Function: Bluetooth,Noise Cancelling Place of Origin: Guangdong China (Mainland) color: white, red, black, blue, purple... Packaging & Delivery Packaging Detail: Color box & blister packing Delivery Detail: 20 days Specifications bluetooth headphone, with nice data transit high quality stereo sound performance     Hi-Fi headsetCSR multimedia hi-fi blutooth chipsetBluetooth version v2.1,comply with old versionapply to any mobile phone in compliance with 1.0.1.1.1.2 and 2.0 regulationGot call automatically Redial functionVolume control buttonPause functionProvide 16 digital  DAC audio-out Interface Levels:3.3V—4.2V,lithium batteryBluetooth version v2.1,comply with old versionSB Protocols: USB v2.0Frequency: 2.4GHz ISM bandGFSK(Gaussian Frequency shift keying)Radiated power: ≤4dBm,Class2Effective distance: ≤10m,Class2Sensivity: ≤-95dBm at0.1% BERData transfer rate up to Asynchronous:1-3Mbps(Max)Security : Authnticaton and encryptionBluetooth protocols : HSP1.0,HFP1.5,A2DP1.2,AVRCP1.0working current:2-40mATemperature range: -20~+55C