ITEM NAME:XH-M131 Photoresistor Brightness Auto Control Module 12V Relay Light Switch Product Description Description: Description: 1. This module can be used for light detection and brightness detection. It has power indicator (red) and relay suction indicator (blue), and has four M3 screw mounting holes, which greatly facilitates installation. 2. The board can adjust the sensitivity of light by potentiometer. It has relays. It can be used for various brightness detection and control switches. 3. It can be used for street lights, automatic opening at night, automatic extinguishing during the day, and other devices that need automation. Feature: 1. The module is.Included: 1 X XH-M131 Photoresistor Module. This module can be used for light detection and brightness detection. It has power indicator (red) and relay suction indicator (blue), and has four M3 screw mounting holes, which greatly facilitates installation.