The Intermatic 120 volt timer is very good for lighting, air conditioning or other high amperage devices. It has 4 trippers that you can place for up to 2 on/off times per day. It has a manual override to allow you to turn it on or off without changing the current timing. It has a 30 minute resolution. It will control up to two 1000 watt, three 600 watt or up to four 400 watt lights (120 volt). It has an industry standard 20 amp plug configuration as shown to plug into 120 volt 20 amp outlets.