Feature: Built with BT5.0 version, it offers high data transfer speed, stable connection and low consumption. Wireless dual ear design, left and right ear channel separation. You can use the headset solely, or used them in pairs. 55mAh battery in each earphone ensures about 5-6 hours of working time. Charged automatically in the 600mAh box. Lightweight and portable, easy to store; widely compatible with all Andriod and IOS phones, and other BT-enabled audio devices. Built in touch sensor chip, intelligently senses the wearing status, remove the headset, music stops automatically and sounded again when the headset is put on. Specifications: Brand Name: Bluedio Model Number: Hi BT Version: V5.0 Transmission Distance: 10m/33ft Frequency Range: 20-20000Hz Impedance: 27Ω Sensitivity: 100dB±3 Battery: 55mAh Case Battery: 600mAh Time: about 1 hours Color: Black Earphone Item Size: 48 * 22.6mm Case Size: 67.5 * 60 * 37mm Package Size: 8.5 * 7 * 4.5cm / 3.3 * 2.8 * 1.8in Package Weight: 88g/3.1oz
