The iTEch Power System automatically shuts down a truck that is not being used. The length of time a truck can stand idle is adjustable from 1 to 8 minutes, in four steps. The device helps to reduce fuel or battery usage ......The iTEch Power System automatically shuts down a truck that is not being used. The length of time a truck can stand idle is adjustable from 1 to 8 minutes, in four steps. The device helps to reduce fuel or battery usage and engine wear caused by excessive idle time. It also helps to protect the engine, preventing premature servicing.