Advanced Infrared Sensor Technology: This DIY hand wave sensor switch module utilizes infrared distance sensing technology, allowing for easy and efficient control with just a wave of your handTouch Less Operations: Simply wave your hand within the sensor's range to turn the LED lights on or off, making it ideal for use in cabinets, wardrobes, and other similar applications without the need to physically touch a power switchEnhanced Security and Energy Efficiency: By reducing the need for direct contact with electrical switch, this module helps electric shocks and contributes to reducing unnecessary power consumptionHigh Sensitivity and Quick Response: Designed for high sensitivity and response times, this sensor switch ensures there is no delay in operations, providing an immediate reaction to your hand movementsCompact Design with Easy Installation: This compact module is made from electronic components and comes in a pack of four sensor switch controller modules for convenient installation in various settings Specification: Material:Electronic Components Size Chart: Style A: 4.2 cmx1.2 cmx0.7 cm/1.65 inchx0.47 inchx0.28 inchStyle B:5 cmx1.2 cmx0.7 cm /1.97 inchx0.47 inchx0.28 inch Package Includes: 4Hand Sweep Sensor Module Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.