Perfect Launch Poratble Practice Tree

Pocket size that can be used in the staging lanes or at home in the racing bench. This portable tree is ideal for the pro-racer, or just and enthusiast who likes the thrill of competition with friends. Features a NHRA style LEDs that you can easily see outside, a .4 and .5 tenth second PRO and Full trees, adjustable delay box time, bump down and rollout entries. In cases your not familiar with these terms, an instruction booklet ins included. The Perfect Launch operates on a 9-volt battery and shuts down automatically when not in use for long battery life.