Product information:  

Bluetooth frequency range: 2.4-2.480GHz
Bluetooth transmission distance: 10 meters
Battery capacity: 30mAh for both left and right ears, 300mAh for battery compartment
Standby time: About 420 minutes for dual ear standby
Call/playback time: Headphone playback time is approximately 260 minutes
Talk time: approximately 240 minutes
Headphone charging time: Charging time is about 60 minutes
Battery charging time: Charging time is about 60 minutes (3-4 times for headphones)
Charging voltage of the electric box: 5v

Packing list: 
Headphones * 2+charging compartment * 1+data cable * 1 

Product Image: