220-240V Digital Programmable Timer Switch for Electronic Devices Household Appliances Refrigerator Air Conditioner Irrigation Hydroponic Garden 220-240V Digital Programmable Timer Switch for Electronic Devices Household Appliances Refrigerator Air Conditioner Irrigation Hydroponic Garden Regulate your energy costs and keep your home secure Delivering convenient automation for household appliances Set time to automatically switch on/off all kinds of electronic devices such as light, refrigerator, neon lamp, production equipment, television etc These timers are great for hydroponic systems.