Bluetooth version solution: 5.3 version Jerry 6983D

Wireless frequency: 2.4 GHZ

Support protocol: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3

Transmission distance: 10 meters

Battery capacity: 40 mAh; 350 mAh

Play / talk time: about 6 hours

Charging time: about 1 hour

Charging voltage / current: 5V / 1A

Standby time: 80 hours

Horn impedance: full-frequency horn Φ13 32ohm

Minia-head sensitivity: -42 Db

Operating temperature: -10-50℃

Waterproof grade; IPX 5 living waterproof

material quality:ABS