Transmission range: 10 meters 
 Function: Power display, call function, NFC function, voice control, support music, multi-point connection 
 Bluetooth protocol: 5.0 
 Channel: stereo 
 How to use: Earplug type 
 Single or dual ear: bilateral stereo
 Headphone capacity: 50MAH 
 Charging bin capacity: 6000MAH 
 Headphone charging time: 30 minutes 
 Charging time of charging bay: 3.5H 
 Cumulative listening songs: about 80H 
 Life time: about 500H 
 Applicable products: smart matching mobile phones, tablets (IOS, Android universal) 
 Product list: charging bay x1, earphone x2, 3 pairs of ear caps (1 pair is attached to the earphone), manual x1, data cable x1