TERRA HAVEN 10pcs TTP223B Capacitive Touch Switch Module Touch Sensor Switch Digital Capacitive Touch Sensor Switch DC 2~5.5V

This is the "momentary" variety of the touch sensor - touch and it turns on, release and it turns off.
Positive and negative can be used as a touch surface, can replace the traditional touch button.
Four M2 screws positioning holes for easy installation. Module can be installed in such as surface plastic, glass of non-metallic materials.
In addition to the thin paper ( non-metallic ) covering the surface of the module, as long as the correct location of the touch, you can make hidden in the walls, desktops and other parts of buttons.
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
When a finger touches the corresponding position, the module output high, if not touched for 12 seconds, switch to low-power mode.