כובע סרוג בלוטות'

Transmission range: 10 meters
Function; battery display, call function, support music
Bluetooth protocol: 5.0
Channel; stereo
How to use: head-mounted
Whether single or dual ear: bilateral stereo
Applicable gift-giving occasions: opening ceremony, anniversary celebration, advertising promotion, trade fair, festival, public relations planning, business gift
Color: RM-black