This is a 4 channel capacitive touch switch module. In the normal state, the module output low level. When a finger touches the corresponding position, the module output high, if not touch, switch to low-power mode.
Working voltage: 2.0-5.5V
Low power mode: 4uA
Max consumption: 11.5uA
Automatic calibration, when no buttons are touched, the system recalibration 4 seconds each time