LENYES Air 98 TWS Wireless Earphone Transmission frequency 2.4GHz, Class 2 Effective distance ≥ 10 meters. Call time of 4 hours. 20 hours of standby time. Music playback time is about 5 hours (50% volume). Earphone battery polymer lithium battery capacity 401010 30mAh/3.7V. Charging case battery polymer lithium battery capacity 701530 300mAh/3.7V. Charging interface Type C. Spatial sound effects, immersing oneself in its surroundings