The module is based on a touch-sensing IC TTP223B capacitive touch switch module. In the normal state, the module output low, low power consumption, but when a finger touches the corresponding position, the module output high, if not touched for 12 seconds, switch to low-power mode.Module can be installed in such as surface plastic, glass of non-metallic materials.You can put to a thin non-metallic paper cover the surface of the module , when touch the correct location of the module , that you can put it hidden in the walls, desktops and other buttons.Low power consumption.Green LED Indicator, and it is bright when power on right.Both positive and negative can be used as a touch surface, and replace the traditional touch of a button.