The Apollo? 18 has two separate timing schedules and can operate two different appliances simultaneously. It features 8 timing schedules per total day and the enclosure resists dust, rust and moisture in the garden environment. This precision digital timer provides the grower with the perfect timing solution to operate cloning machines, CO2 systems, pumps, fans or other 120 volt appliances. 120 Volts/15 Amps/60 Hz.