Spec:

Bluetooth version :5.0

IC: Realtek chip

Earphone capacity :50mah

Case capacity :450mah

Working hours :4-5 hours

Cyclic charging :4 times

Function: Volume+/-, Song next & pre, Phone answer & hang up

Material: aluminum alloy housing

Color:  black, silvery or custom color

Support OEM customized services, such as logo, specifications, colors, pack etc

Warranty :12 months