R21 Mobile Phone Earphone In Ear Drive By Wire

Product information:
Purpose: mobile phone headset
Color: R21 [Black], R21 [white]
Headset output audio: communication equipment
Plug Type: Other
Headphone type: in ear headphones
Plug diameter: 3.5mm
With or without microphone: Yes
Sound principle: moving coil
Wire Length: 1.2
Wireless or not headphones: wired headphones
Wearing method: in ear