The Apollo® 7 - 24 hour digital timer is the perfect timing solution for your hydro systems. With a 15 Amp capacity, it's easy to set to run your pumps, fans, etc. The Apollo® 7 may be set to 1 minute intervals and run 8 separate schedules per day. Can be configured in numerous timing schedules to meet the most demanding timing requirements. One (1) outlet with 1 minute intervals. Battery back-up feature saves settings if power goes out. Plastic enclosure resists dust, rust and moisture. Do not use with digital ballasts. 15 Amps maximum/120 Volts/60 Hz. HINT: If not working properly, plug in for 5 minutes & press the reset button. Generally fixes the problem. Do not use with digital ballasts.