Couple:V4.1 2016 hot selling sport wireless bluetooth headphone/earphone/headset with pair up to 2 device1. Concealed LED indicator on product, which can reflect turn on/off models.2. Natural Nontoxic silica Gel, soft and comfortable to wear, strengthen bass effect.3. High sensitive microphone.Product Parameters:Product Description:* Bluetooth Solution:CSR 8670 , 4.1 (Low Energy Long using time)* Battery:Built in 80mAh rechargeable battery* Using time:Talk time: 6 hours, Music play time: 5 hours* Standby time:Up to 200 hours* Charging time:1.5hours through micro USB charging port* Battery icon:Can display on the iPhone/iPad/iPod* Profile Support:HSP/HFP/A2DP/AVRCP* Functions:Answer phone, listen to music, Noise Canceling* Connect devices:Through bluetooth connecting with two Bluetooth devices at the same time* Materials:ABS and Aluminum alloy Metal* Weight:8gBluetooth Version4.1Bluetooth protocolHSP,HFP,A2DP and AVRCPSupportSBC , MPS decoder and APT-XTalking / Playing time6 hours/ 5 hoursStandby time200 hoursCharging time2 hoursTransmission distanceAbout 10 metersWeight11.8gImpedance16 ohmFrequency response20-20kHzLoudspeaker size8mmSensitivity100 /-3dbCharging input5V/200mACertificationsBQB, CE, RoHS, REACH,FCCOEM/ODMYesPatentHave patentProduct Functions:1.Support remote control of play/pause, next song/last song,volume up/volume down,pick up/hang up/ reject the phone calls,last number redial.2.Pause the music