Bluetooth version v5.0
battery capacity 45mah * 2 / capacity 390mah
drive unit 6mm
product color black
charging time 1.5h
call duration 5h
music duration 4h
input charging standard dc 5v
best talk distance <1m
maximum transmission distance 10m
voice prompt support
bluetooth working frequency 2.402gh-z-2.480gh-z
impedance 32ω
sensitivity 92db ± 3db
frequency response range 20-20000hz
multipoint connection not supported
wearing style in-ear
manual chinese and english
included accessories usb charging cable, instruction manual, size earbuds