These bluetooth intercoms allow conference call style talk amongst several riders.
The BT Next Pro is designed for up to 4 bikes with 2 riders on each, all talking at once at up to 1.6 km range in line of sight. Sounds a bit busy, but in practice it's handy for organising rest stops, route changes and the like.
The BTX2 Pro is similar albeit with a 1 km range and 4 riders in total.
Both have an incredible range of features including Talk2All for use with other brands of intercom, background GPS or BT radar audio, FM radio, music sharing, multiple cell phones, brake light, super long talk time, VOX control, optional handlebar remote control and waterproof to IPX 6.