This module is based on a touch-sensing IC (TTP223B) capacitive touch switch module.
In its normal state, the module output is low and has a low power consumption.
When touched the module's output turns high and if not touched for 12 seconds switches back to low-power mode.
Voltage : 3.3v to 5V
Interface: G (GND), V (VCC), S (signal)
Response Time: 60-220ms
PCB Size: 23mm x 23mm