Based on a touch detection IC (TTP223-BA6) and the IC is in toggle mode; Power on the module output low level and the mode is low power mode; Touch related position with finger module will output contrast level ( ie the original output is high and then output is low after touch) and the mode is switched to fast mode and back to low-power mode if not touch for 12s; Can be installed on various surfaces such as plastic glass and non-metallic materials. 1. Funny and easy to use can replace the traditional self-locking switch; 2. Increase the filter circuit the signal output stable; 3. Low power consumption; 4. Power supply can be 2~5.2V DC; 5. Immersion gold process long service life; 6. 4 x M2 screw mounting holes