4 Channel Capacitive Touch Sesnor Module uses the touch-sensing IC TTP224 to sense the touch input thus making it easy to add capacitive touch input to your project. The touching detection IC is designed for replacing traditional direct button key with diverse pad size. The module has 4 touch pads. Power the module with 2.4 ~ 5.5V DC and the touch pad is all active to sense the input.
 
Specifications:-
Onboard TTP224 capacitive touch sensor IC
4 board-level status indicator
Working voltage: 2.4V - 5.5V
Advanced Pins breakout, so that the output mode and working mode selectable.
Low power selection