This capacitive touch sensor module uses the TTP229 integrated circuit, making it easy to add capacitive touch input for projects. It features 16 sensitive touch pads that make an ideal replacement for the traditional keypads. Specifications On-board 16-key TTP229 capacitive touch sensor IC On-board power indicator LED Working Voltage Range: 2.4 V to 5.5 V Configurable output mode PCB Size: 49.3 x 64.5 mm