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