1. Stereo sound bluetooth 5.0 version two-way voice call intercom function. 2. Ultra-low power consumption, long-time playback, excellent sound quality. 3. Long-distance, ultra-stable TWS connection. 4. Solar charging for unlimited battery life and continuous power. 5. Charging case supports TYPE-C charge and discharge function, support QC and PD protocol. 6. Charging case supports built-in 5W wireless charging function for fast charging. 7. Charging case with intuitive digital power display.