This true wireless BT headset uses BT 5.3 chip, improve transmission speed. automatic pairing after booting, built-in active noise reduction IC, high-definition call, large-capacity and long-lasting battery life. The independent LED bluetooth earbuds battery power indicator can clearly see the charging status of each earphone and charging box. This product uses 14.2 graphene diaphragm, professional alloy sound transmission network, Intelligent noise reduction, 108dB sensitivity, oxygen-free copper voice coil. Longer Music/ Talk Time: the wireless earpiece with built-in rechargeable lithium-poly 30mAh battery, last for 3.5 hours of audio under 100% volume, and The Charging Bin battery capacity 200mAh Smart operation: automatic power on/off/answer/reject/previous/next/call Siri. one button design, easy to use, phone calls and control music play by one button. deal for in car calling and friends chatting, play games or working use.