Product name: Photo switch switch Input voltage: DC 12V Max load current: 10 A Body size: about 4.3 cm x 4.2 cm x 3.5 cm Used: Turns off when there is light, turns on when there is no light, no manual operation. It is a light sensor switch of waterproof processing. The sensor responds to light and dark, and controls ON / OFF of the switch. LED lamps, energy saving lamps, fluorescent lamps, incandescent lamps, ventilating fan lamps, etc. can be used as control targets. Since it is automatic control, it prevents forgetting to turn off the power, and it is also useful for energy saving. You can use it for automatic control in street lights, schools, factories, etc. It is also waterproof so you can use it for cars, boats, and a wide range of other uses. Connect the black wire and white wire to the power supply and connect the red wire and the white wire to the load (electric light etc.). Wrong wiring not work correctly. Please confirm the product image and wire it correctly. Although this product can be used either upwards or downwards, so that the sensor can judge the light and darkness of light Please install it. Color: white + blue Material: plastic + metal Package Contents: 3 x switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.