Features:Professional sport Bluetooth earphone, waterprof, sweatproof and dirt-resistance.With touch function, you can power it on/off, call/reject, which is convenient to use.Simply put your earbuds near the charging interface and they will be held in place magnetically and recharge.Wireless Dual Ear Stereo Design, Left and Right Ear Channel Separation.Stable and Comfortable when walking, exercising, running, climbing, driving, skating, cycling, fishing and other outdoor sports.Wireless Bluetooth 4.1Technology, ensure transmitting strong signal in high quality and high speed and offering high-fidelity stereo music.Specifications:Color: BlackBluetooth Version: v4.0+EDR,Transmission range: 10m/32.8ftBluetooth frequency: 2.4-2.46GHZ Working voltage: 3.2-4.2VMusic time: 2.5HTalk time: 3HNote:Please allow 1-3mm differs due to manual measurement.Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding.