Features The board is equipped with 4-channel state indicator, easy to use and practical. The board is equipped with a TTP224 capacitive 4-button touch induction IC. 2.4V-5.5V working voltage, compact structure and small size, convenient to use. High quality TTP224 4 channels digital touch sensor module. The module can set output mode, key output mode, long output time and fast/low power selection. Specification:Condition: 100% Brand New Item Type: Touch Sensor Module Working Voltage: 2.4V-5.5V Pin Description: OUT1-OUT4: Module Output Pin GND: The module is connected to the ground of the external circuit VCC: Connected to the power supply Board Size: Approx. 35 x 29 mm / 1.4 x 1.1 in Package List:5 x Module Package List 5 x Module