The W-RC401 is a high accuracy digital timer and designed to cycle a load on and off or cycle between the two loads. The ON and OFF cycles are independently adjustable. It can be easily to adjust a time units (sec, min, hr) and time range between 1 and 99, when the supply voltage is applied the ON cycle begins timing, the relay will energized. Upon completion of the delay, the relay will de – energize, and the OFF cycle begins timing. The timer will continue cycling until the supply voltage is removed. The case can be mounted on a panel or surface