Product DescriptionColor: BlackFEATURESSporty idea injected,Website:http://www.s-ksenic.com, light in weight and easy to carry Ergonomic design, comfortable like you are wearing nothing Two wearing ways at your choice with adjustable headband Detailed voice instruction guiding your operation Rubber coating, comfortable to wear Superb sound quality Built-in microphone SPECIFICATIONBluetooth version: V4.1 Frequency range: 2.4GHz - 2.48GHz Operating distance: above 10m (free space) Standby time: up to 330hrs Talking/music-playing time: about 10 hours Charging time: about 2.5 hours Bluetooth profiles: A2DP, AVRCP, HSP, HFP Frequency response: 20 -22kHz Operating Temperature:-10 ~50 C Note: Please wearing right earphone in right ear and left earphone in left ear , which will be more comfortable and stable. 1. USB charging port on product body , not on control pannel , it avoid big size control pannel.2. Concealed LED indicator on product, which can reflect turn on/off models.3. Natural Nontoxic silica Gel, soft and comfortable to wear, strengthen bass effect.4. High sensitive microphone.Product Parameters:Bluetooth Version4.1Bluetooth protocolHSP,HFP,A2DP and AVRCPSupportSBC , MPS decoder and APT-XTalking / Playing time10 hours /10 hoursStandby time330 hoursCharging time2.5 hoursTransmission distanceAbove 10 metersWeight12gImpedance16 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