Product Name: Photosensor Switch Input Voltage: DC 12V Maximum Load Current: 10A Dimensions: Approx. 4.3cm x 4.2cm x 3.5cm Usage: Turns off when there is light, turns on when there is no light, no manual operation. It is a light sensor switch with waterproof processing. The sensor reacts to light and darkness, controlling the ON/OFF of the switch. LED lights, energy-saving lamps, fluorescent lamps, incandescent lamps, ventilation fans, etc. can be used as control targets. Because it is automatic control, it prevents forgetting to turn off, 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 boats and a wide range of other applications. Connect the black wire and the white wire to the power supply, and connect the red wire and the white wire to the load (electric light, etc.). Incorrect wiring will not work correctly. Please confirm the product and connect it correctly. Although this product can be used either facing up or down, so that the sensor can judge the light and darkness of the light, Please install it. Color: White + Blue Material: Plastic + Metal Package Contents: 4 x Switches 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 to differ slightly from the real thing. Allowed measurement error is +/- 1-3cm.