From what I understand, it hasnt came out yet, and I know Amainhobbies.com wont get it until Dec.1

If you run a brushless setup, it comes with a little sensor to apply to the motor itself, and the RPM has a sensor as well, which you apply a little black dot on the spur gear, and then hook up the sensor to the spot you need to, so it can read the dot.

It's basically the same thing as their Telemitry unit they currently sell.