Features: Upgraded BT5.2 chip provides stable and fast connection, low latency, strong anti-interference ability. Enjoy excellent tune quality and fluent game sound. With Intelligent touch operation, easy to switch previous/next song, answer/hang up, wake up voice assistant. Left and right earphone can be used separately and seamless switching between single/binaural modes. Adopt 13mm copper ring composite diaphragm horn, the multi-layer sound effect is superimposed to ensure balanced sound effects and bring HiFi sound quality. Support AAC/SBC audio decoding, bass-heavy surround sound effect, bringing a rich music experience. Built-in 35mAh battery in each earphone and built-in 250mAh battery in charging chamber, free to listen 3hrs music after one full charged. Easy connection, after the first successful pairing, just take out the earphone, they will automatically connect with your mobile phone. Ergonomic semi-in-ear design, the earbud fits ear canal, not easy to drop, comfortable to wear. Specification: Model: XT97 Color: White, Black (Optional) BT: 5.2 BT Transmit Distance:10m Speak Unit: 13 mm Transmission Distance: 10 meters Headphone Battery capacity: 30mAh Usage Time: About 3 hours (Earphones) Earphones Charging Time: About 1.5 hour Earphones Chamber Battery Capacity: 250mAh Package Size: 139x91x31mm/5.4x3.5x1.2in Package Weight: 65g/2.2oz Packing List: 1 x Charing Case 2 x Earphones 1 x User Manual 1 x Charging Cable 1 x Earphone Cups