For: V4 4V helmet walkie-talkie
1.It suits for helmet Bluetooth intercomV4 and V6.
2.It s specially offered to backup for Bluetooth intercom interphone and some motorcycle who own several Motorcycle helmets, with this backup, you no longer need to change headset from this helmet to another one.
3.3.5Mm jack plug(for iPhone s earphone is compatible).
Product Size: 11 * 5 * 1cm
1 X Headphone (with mic)
Fenghong Headphone (with mic) Motorcycle Helmets Helmet Intercom Headset Bluetooth Headset Durable with Speaker Sport - B07F6G9355