Product information:
Transmission range 2: 0 meters
Function: battery display, call function, NFC function, voice control, music support, multi-point connection
Custom processing: Yes
LOGO can be printed
Bluetooth protocol: 5.0
Channel: Stereo
How to use: earplug type
Whether single or double ears: bilateral stereo

colour
A: F9-13 touch 5.1 fingerprint version black [5.1 chip primary and secondary synchronization + HIFI stereo sound + mobile phone charging],
B: F9-13 Touch 5.1 Fingerprint Edition White [5.1 chip primary and secondary synchronization + HIFI stereo sound + mobile phone charging],
C: F9-13 Touch 5.1 Breathing Light Version Black [5.1 chip primary and secondary synchronization + HIFI stereo sound + mobile phone charging],
D: F9-13 Touch 5.1 Breathing Light Edition White [5.1 chip primary and secondary synchronization + HIFI stereo sound + mobile phone charging],
E: F9 Touch 5.1 Normal Edition Black [5.1 chip primary and secondary synchronization + HIFI stereo sound + mobile phone charging]

Packing list:

Headphone X1