I am an Chinese seller,providing customers with high-quality and low-cost products.The types of products we sell include Home & Kitchen,Health & Beauty,Fashion Clothing,Electronics,Watches & Jewelry,and so on.We keep up with the most popular fashion trends. If you like our products, please follow us and become our followers and fans.Sincerely at your service .Please feel free to contact us if you have any questions.Specifications:Taiwan and the bluetooth-compatible master control chip.Can talk, listening to musicn.Built-in DSP audio processing system, can be a very good eliminate noise and echo, to ensure clear communication, and music.2 in a row, to the telegraph, voice prompt operation.Small and light, stealth design.Intelligent voice prompts the state of equipment/to cable.Item Name: Mini HeadsetBluetooth version: V4.1 + EDRBluetooth profiles: Hands free/HeadsetRadio frequency: 2.402-2.480GHzTransmission power: Class2Support A2DP: music playback (audio output: 35mW, Play/Pause)Transmission range: 10mCharging Power: AC input 110-240V, DC output 5V (charging time/about 2 hours/charging voltage 3.7V)Talk time: About 2-4 hoursMusic playback: About 1-3 hoursStandby time: About 72-120 hoursWorking current: