AUTOLOVER 1000M Motorbike Bluetooth Headset, Motorcycle Helmet Intercom Interphone and Audio for MP3 Player/GPS/Walkie-Talkie, Hands Free & FM Radio (Single) Price: $45.99 (as of 02/06/2019 07:45 PST- Details)

Bluetooth intercom: Can talk via Bluetooth intercom function with your 2 or 3 partners freely. (but only 2 riders intercom at the same time) in 800-1000m distance. (For the rider quantity supported, it depends on the walkie talkie itself)
Water resistant: No worry any more when driving in the raining day or snowing day.
Advanced Noise Control technology: With technology of DSP echo cancellation and noise control, the high-quality and clear voice can be guaranteed in a high speed riding.