Bluetooth version: 5.0
supported protocols: hsp, hfp, a2dp, avrcp
battery capacity of single earbud: 45mah
battery capacity of charging case: 400mah
★talk time: 4hours
★play time: 4hours
★charging time:1.5 hours
★standby time:40 hours
maximum transmission distance: 10m
user manual: chinese/english
included accessories: usb cable, user manual, 3 earmuffs