Function: 1. Both front and back can be used as touch surfaces, which can replace traditional touch buttons. 2. 4 M2 screw positioning holes for easy installation. 3. Light touch contact type touch sensor, and then touch sensor for a long time, the table lamp can be bright and long. 4. Green LED power indicator, lights up when power is on. 5. Adopted high-quality electronic components and precision process, ensure durability. Specification: Condition: 100% Brand New Item Type: Touch Sensor Module Power Supply: 2~5.5V DC Screw Positioning Holes: 4 x M2, 2.2mm Control Interface: Total 3 pins (GND, VCC, SIG) GND is ground, VCC is power supply, and SIG is the digital signal output pin. Power Indicator: Green LED, it lights up when properly powered. Touch Area: The inner area of the icon resembling a fingerprint, which can be triggered by a finger touch. Size: 24 x 24 x 7.2mm / 0.9 x 0.9 x 0.3in Weight: 2g / 0.07oz Package List: 10 x Touch Sensor Module