luetooth version V5.0 
Frequency Range 20Hz-20kHZ 
Transmission distance ≥10m 
Headphone battery capacity 50mAh*2
Charging input DC5V/1A 
Charging box battery capacity 400mAh Music playing time Headphones about 6 hours (50% volume) charging box about 16 hours Charging time The headset is about 1 hour, the charging box is about 1 hour support HSP/HFP/A2DP/AVRCP weight Headphones (both ears) about 5g, charging box about 32g