The NFT-1e fixed cycle timer by Custom Automated Products is the simplest device available for turning a device ON and OFF at precise intervals. They are great for turning on and off pumps in aeroponic and nutrient film technology systems. The NFT-1e timer is pre-set to turn ON for 1 minute and OFF for 4 minutes. NFT timers are rated for 15 amps at 120 volts. 3 year warranty.