In-wall 24-hour mechanical timer. Can be set for 1 hour to 24 hours. This compact wall switch timer can be used to replace standard wall switches. It includes manual on/off override. 24-hour repeating cycle turns devices on and off at the same time daily. Programmable in 20-minute time intervals providing up to 72 setting options in a 24-hour period. Easy to operate slide switch, with 1-touch easy setting. Compatible with CFL (compact fluorescent), LED (light emitting diode), and incandescent light bulbs.