Bluetooth Version :V5.3 

Working distance :10 

Battery Specification :3.7V 300mAh

Built-in rechargable Lithium battery charging Voltage: DC4.2-5.2V 

Charging time : 2.5 Hours

Talking time :up to 30 hours at default Vol

Driver :2x40mm  Impedance:64ohm

S.P.L(at 1Khz) 

TYPE C

AUX-IN

Charging for 1 hour in the sunlight allows for 12 hours of use

 (depends on sunlight conditions)