needing attention:the battery(battery pack or combination battery)mustnot be exposed to such conditions as sunlight, fire or overheating

Bluetooth copyright:V5.0

Speaker: 5W

Newly added features: volume keys, TF card socket

Product Function: Bluetooth/TWS

Operating frequency:100Hz-20KHz

Effective distance:≥10m

Signal to noise ratio:≥75db

Input:Type-c 5v

Battery:500mAh

Input sensitivity:600mv

Use time:about: 3hours

Charging time:2-3hours

Standby time: about 120 Day

Product package weight:180g

Package size:110*90*55mm

This product is upgraded from May 20 (with TF card jack, volume keys), if you have any