Impedance: 9 OHM
Bluetooth version: Bluetooth 5.0
Output power: 40mW;Battery capacity 35MAH , charging box is 300mh .
Bluetooth distance: 10 meters
Frequency response: 20-20000Hz
Operating voltage range: 3.0V-4.2V
Powerful noise de-noising circuit (active noise reduction)
The charging time is about 1-2 hours.
Talk time is about 2-3 hours (a pair of earphones used together ), music time about 2-3 hours (a pair of earphones used together ), Charging box can charge the earphones about 3-5 times.