bluetooth version:5.0
transmission range: up to 10m
speaker size: 40mm

impedance: 32 Ohm

sensitivity: 110dB +/-3dB

frequency response: 20Hz-20kHz 

built-in rechargeable battery: 300mAh

stand by time: 80 hours

music play time: 8 hours

charging time: 2 hours 

packing:headphone+charging cable