The Intermatic EI200 30 minute electronic wall switch timer is a auto shut-OFF timer provides silent operation in time ranges from 5 minutes to 30 minutes. The EI200W timer switch operates all load types including CFLs, LED lamps, and fans. This timer requires no programming; preset countdown times are activated by pressing a single button. Silent operation makes this timer ideal for applications where the noise of mechanical countdown timers is of concern.