Product information: 

Transmission range: 10 meters 
Function: battery display, call function, support music 
Channel: Stereo 
How to use: Earplug type 
Single or dual ear: Bilateral stereo 
Color: Tech Black Gaming Headset 
Life time: 4 (hours) 
Headphone battery capacity: 3.7V/35mAh 
Charging box battery capacity: 3.7V/300mAh

Size Information: 
Charging box size: 60*60*.29mm

Packing list: 

Earphone + USB cable + charging compartment + manual