Features: BT5.0 quick connection, low latency, stable and fast transmission, wide compatibility. Adopt metal composite diaphragm, full-frequency horn with powerful bass, HiFi stereo sound effect. Built-in microphone brings clear and bright sound without delay, making voice natural. Support true wireless stereo connection, two of them can connect to each other for powerful rich sound. Simple button operation, easy to play/pause, adjust volume, answer/hang up, reject call, etc. Built-in 1200mAh large capacity lithium battery, long endurance time. Specification: Type: BT speaker Brand: Lenovo thinkplus Model: K3 Pro BT version: V5.0 BT transmission distance: 8-10m Playing time: About 6-8 hours Battery capacity: 1200mAh Packing list: 1 * Speaker 1 * Charging cable 1 * User manual