1.Bluetooth version 5.3 2.Transmission frequency 2.4GHz, Class 2 3.Effective distance ≥ 10 meters 4.Receiving sensitivity -96dB/1M 5.Speaker dynamic coil Φ 10mm 6.Call time of 4 hours 20 hours of standby time (average current 0.6MA) Music playback time is about 5 hours (50% volume) Earphone battery polymer lithium battery capacity 401010 30mAh/3.7V 7.Charging case battery polymer lithium battery capacity 701530 300mAh/3.7V 8.Charging interface Type C 9.Spatial sound effects, immersing oneself in its surroundings 10.Professional noise reduction with dual wind noise resistance (ANC+ENC) 11.Hi Fi sound quality, reproducing studio level, spatial sound effects, immersive without boundaries Bluetooth 5.3, soaring performance All weather, ultra long range 12.Compact appearance, piano painted, showcasing high-end. 13.Key point: ANC active noise reduction, most cost-effective"