The DUAL OUTLET grounded multi-pin timer is extremely easy to use with most indoor appliances. There are up to 48 on/off daily settings with easy to use trippers. Trippers are pushed down for each fifteen minute on cycle. Controls cycles as long as 23 3/4 hours, or cycles as short as 15 minutes. 15 amp capacity allows for use even with 1000 Watt HID lights.