Specifications:

The earphone has Bluetooth 5.0 chip, which has fast and stable connection.
With smart touch operation, it is convenient to use.
It has built-in active noise reduction IC, providing HD phone call.
You can use one earphone or two with HiFi stereo sound.
Bluetooth Version: 5.0
Charging Voltage: DC 5V
Microphone Sensitivity: -42Db
Charging Time: about 1 Hour
color; black