▪️Bluetooth specification Bluetooth - V4.2 WT 
▪️Transmission range - 10 meters
▪️Transmission frequency - 2.4GHz
▪️Charging voltage DC5V charging time is about 2 hours
▪️Battery capacity - 50mAH; Product size: L50  W12  H20mm
▪️Talk time 3 hours 3 hours music time; standby time 90 hours
▪️Product net weight - 7g