The touch key switch module provides stable human touch detection, replacing traditional direct switch keys. This is a very useful addition for projects or applications where traditional mechanical buttons or switches are not a perfect choice. The touch button capacitive switch module can be installed on non-metallic materials such as plastic and glass surfaces. As long as the touch position is correct, it can be hidden on walls, desks, etc. Trigger setting mode: (1-short circuit; 0-no short circuit) Power supply: 2.5v-5.5v/2W AB=00: No-lock High TTL level ouput; AB=01: Self-lock High TTL level ouput; AB=10: No-lock Low TTL level ouput; AB=11: Self-lock Low TTL level ouput; size: 14 x 12mm Material: PCB colour: red Package Contents: 180 x module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.