The 2455R-100-75 is a Honeywell, 40VA 240V, 50/60Hz, Single Pole, UL Listed, white, Mechanical Interval Timer. This mechanical interval timer is used to control non-heating, lighting, and fan loads in time delay applications. It can be connected to any 24V or 120V AC or DC control circuit switch. The 2455R-100-75 has two modes of operation, a normal on/off function, as well as an adjustable delay on and adjustable delay off. The adjustable delay on and off functions allow the timer to control a load at a set interval.