Features: Knob Switches designs allows for a straightforward setups, none professional help required. Automatically turn close all types of Light including LED, fan and heaters at presets time. The redness LED light is turn on, easy to locate in dark. (Note: light is close when it is working normally, and it is on when it is not working. ) Great for bathrooms, closets, storage room, garages, laundry room. Stable mechanical timer ensures consistent power close, none intelligent device need. Specifications: Component: ABS Type: 15A 15min/15A 30min/15A 60min/15A 120min Size: about 8.6x8.6x3.7cm/3.39x3.39x1.46inch Working temperature 0-45℃ Package Includes: 1pc Mechanical Timer Swtiches note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color. Knob Switches designs allows for a straightforward setups, none professional help required. Automatically turn close all types of Light including LED, fan and heaters at presets time. The redness LED light is turn on, easy to locate in dark. (Note: light is close when it is working normally, and it is on when it is not working. ) Great for bathrooms, closets, storage room, garages, laundry room. Stable mechanical timer ensures consistent power close, none intelligent device need.