With 28 on/off settings and manual operation: Save time, energy, and your energy by automatically turning on hydroponic systems, garden lights, cameras, Christmas lights, fans, radiators, and other electrical appliances. And automatically turning them off. Can be used in automatic garage door openers, automatic fish feeders, automatic heaters, light strips, neon lights, water heaters, water dispensers, fans, phone chargers, kitchen appliances, radios, TVs, and street lights. Save energy. Provide flexible power for your household appliances. With this digital timer, you can easily control to achieve optimal efficiency. Specifications: 1. Continuous interval: 1 minute to 168 hours (7 days) 2. Programmable: 28 times/week or day 3. Contact capacity: 16A 4. Power: up to 2W 5. Built-in battery: 1.2V/40mA (battery) 6. Size: 60x60x32mm 7. Off memory: 60 days 8. Operating temperature: -10 to +40 C 9. Rated voltage: DC 12 V 10. Minimum interval: 1 minute 11. Buttons: Clock, timer, day, h+ (set time), m+ (set minute), manual override, reset