Couple:Sports stereo bluetooth headset , lover sharing earphone1. 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:Bluetooth Version4.1Bluetooth protocolHSP,HFP,A2DP and AVRCPSupportSBC , MPS decoder and APT-XTalking / Playing time6 hours/ 5 hoursStandby time200 hoursCharging time1.5-2 hoursTransmission distanceAbout 10 metersWeight6gImpedance16 ohmFrequency response20-20kHzLoudspeaker size8mmSensitivity100+/-3dbCharging input5V/200mACertificationsBQB, CE, RoHS, REACH,FCCOEM/ODMYesPatentHave patentMain Feature:1.Noise Reduction Technology;2.Support A2DP Music Playing;3.Call Rejection;4.Voice dialing;5.Last call redial;6.Low power alert;7.Battery capacity display;8.Dual connectionTypeCoupleBluetooth specificationV4.1ChipsetCSR 8670Frequency range2.4MHz-2.48MHzOutput powerClass2 (max 4dBm)RX sensitivity-80dBmOperating rangewithin 10mTalking timeabout 5-6hStandby timeabout 200hBattery type80mAh Li-ionVoltageDC 5VSize(L*W*H)53*15*7mmWeight16gProduct 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 & play back automatically when receives an incoming call.3.Microphone silence,voice transfer and three-way calling (your cellphone needs to support this function).4.Automatically connect to the last connected Bluetooth device, and it can connect two cellphones at the same time.5.It can display this earphone's battery power on Apple devices.6.Automatically turn off without connection for 5min.About us:We have been manufacturing electronics products for more than 10 years and not once did we outsource our core processor. We  are specialized in Blutooth, most of our products with BQB/CE/RoHS/FCC approved.We can also assemble as many as 120,000 headsets each month. With high quality machines at our 10,000 square meters factory, we can further ensure expedited manufacturing processes. Each month, our 20 R&D engineers add at least on new model to our wide range of headsets and handheld and in-vehicle radios. We are welcome any OEM &ODE.