Headphone function:1. V5.0 Bluetooth, hands-free calling, lossless sound quality, new binaural voice call function, and solve the problem of traditional Bluetooth card and delay, dual-use machine. 2. Wireless Bluetooth headset, ergonomic, comfortable to wear, no movement, long-wearing, double-sided stereo3. Charging for 1-2 hours, playing time is 4-6 hours, standby time is up to 180 hours per hour4. Compatible with 99% smart devices with buttons, LED indicators, MC microphone, switch button