Learn to hit 0.000 reaction times!

With this shirt-pocket sized Perfect Launch portable practice tree, you can perfect your reaction time almost anywhere. This portable practice tree is ideal for the pro-racer, would-be racer, or anyone who just likes the thrill of competition. It features a remote thumb trigger, .4 and .5-second PRO and FULL trees, plus an adjustable delay box, bump down and rollout. In case you're not familiar with those terms, the included instructions will have you up to speed in no time. Operates via 9-volt battery and shuts down automatically for longer battery life. Measures 4.5'' x 2.75'' x 1''.