While HUD (Head-Up Display) technology is becoming increasingly common in cars and even motorcycle helmets, it’s still largely unavailable to cyclists. That could soon change however, if the SoulRS helmet-mounted HUD reaches its crowdfunding goal.
First of all, it should be noted that SoulRS is also intended for use on motorcycle helmets, not just bike helmets. In either case, it attaches in more or less the same fashion
A curved baseplate gets stuck to the front of the helmet via a two-sided adhesive pad, then the visor-shaped HUD module can be slid in and out of a slot in that plate as needed. This functionality allows the HUD module to be taken off for battery charging, and to be swapped back and forth between multiple baseplate-equipped helmets.