Features: 1. Capacitive touch IC, uses TTP224 for responsive 4-key touch induction capabilities. 2. 4-channel indicator, features onboard level state indicator for easy monitoring. 3. Components ensure durability with accurate processing and electronic components. 4. Easy installation, compact and user-friendly design for effortless setup and removal. 5. Customizable output modes, set key output, maximum output time, and power selection with ease. Specifications: 1. Onboard TTP224 capacitive 4-key touch sensing IC 2. Onboard 4-way level status indicator lights 3. Working voltage: 2.4V5.5V 4. Module can set output mode, key output mode, maximum output time, and fast/low power consumption selection 5. PCB board size: Approximately 35 mm x 29 mm Material: PCB Color: As shown Package Contents: 5 x TTP224 4-way touch switch module Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the actual product. Measurement allows an error of +/- 13 cm.