Back Torque Limiter from Straight
This miniature electronic gadget you see above, on its own and mounted to the top of a receiver in a 1/12th scale car, is a Back Torque Limiter. Made by Straight Ltd in Japan this rather smart piece of wizadry is essentially an adjustable braking device which not only helps your car brake smoother but also reduces damage to the motor as well. I dont know how it does all this and even if the site wasnt only in Japanese i probably wouldnt be able to figure it out anyway.
Source: Straight Ltd [cna.ne.jp/~straight] via Kimihiko Yano [kimihiko-yano.net]