Product information:

Type: wireless
Headphone type: In-ear headphones
Wearing method: In-ear
Plug diameter: wireless
Plug type: Bluetooth
Whether wireless headset: wireless headset
Is there a microphone: yes
Sounding principle: moving coil
Color: black [upgraded version 5.1 core + display]
Channel: Stereo
Transmission distance: 10m
Bluetooth protocol: Bluetooth 5.1

Single earphone size: 16*17*36mm
Charging compartment size: 60.4*50.7*22.4mm

Packing list:

Bluetooth headset*1
Data line*1