Feature: 1. This microcomputer timer switch is very easy to install, which makes it popular among the workers. 2. If the user sets the time, this timer switch can automatically turn on and off the devices. 3. The timer switch is widely used in street lights, neon lights, advertising signs, production equipment, radio and television equipment, and other power equipment and household appliances that need to be turned on and off regularly. 4. There are two installations of this timer switch, that is monitor and wall installation, which can be chosen by user. 5. With small in size and light in weight, user can easily install and detach this timer switch. Specification: Item Type: Microcomputer Timer Switch Material: ABS Model: TM630S-4 Power Supply: DC12V Capacity: Resistance 30Ω Energy Consumption: <5VA Time Range: 1 minute-168 hours Brief Fainting: 90 days Installation: Monitor/wall installation Battery Parameters: Built-in button battery CR2450 3V 520mAh. Package List: 1 x Microcomputer Timer Switch1 x English User Manual Note: Do not use outside the parameter voltage range.