1、This programmable digital timer makes it easy to set all your indoor or outdoor electric devices, including lights and hydroponic equipment. 2、Save time and energy by programming your equipment to turn on only when you need it. 3、Widely used in the automatic control in street lamps, neon lights, electric bells, radio and television equipment, production equipment, electrical equipment and household appliances. 4、Built-in high efficient battery as a backup power supply, which can maintain the timing display and storage display and storage of data for more than 12 months. 5、Easy to assemble and use. Features: This programmable digital timer makes it easy to set all your indoor or outdoor electric devices, including lights and hydroponic equipment. Save time and energy by programming your equipment to turn on only when you need it. Widely used in the automatic control in street lamps, neon lights, electric bells, radio and television equipment, production equipment, electrical equipment and household appliances. Built-in high efficient battery as a backup power supply, which can maintain the timing display and storage display and storage of data for more than 12 months. Easy to assemble and use. Specification: Material: Plastic Color: White Operating voltage: AC220V / AC110V / DC24V / DC12V (Optional) Operating Temperature: -20℃~60℃ Switching capacity: 16A Number of programmable: 8 switches  /day Power consumption: ≤5W Timing Error: ≤ 2 sec/day Battery: Rechargeable Pool Size: 8.6*3.6*6.5cm / 3.4*1.4*2.6 inch(Approx.) Package list: 1 *Timer switch 1 * User manual