Feature: 1. No any mechanical components, don't wear out, long lifespan, reduce maintenance cost. 2. Its sensing part can be placed at the back of any insulation layer (usually glass or plastic material), it is easy to make the keyboard sealed with surroundings, to play the role of moisture-proof and waterproof. 3. The panel design follows one's inclinations, arbitrary button size, shape, design, characters, trademarks. 4. Compared with physical buttons, touch buttons are less likely to damage. 5. The output of the signal can be adjusted to either latch output or level holding output by changing the resistance on the back. 6. 2.7-6V wide input voltage wide, 3.3V output signal, can be directly used to drive the relay, optical coupler, LED lights, etc. 7. Sensitive touch, no lag, delay, flash or other adverse reactions. 8. Built-in anti-jamming algorithm, with good anti-interference performance. Specification: Item Type: Capacitive Touch Switch Button Module Operating Voltage: 2.7-6V Operating Temperature: -30 ~ +70℃ OUT Pin Output Voltage: 3.3V ± 0.1V Maximum Output Current of OUT Pin: 500mA Light Color: Blue, Red, Yellow, Green (Optional) Package List: 2 x Capacitive Touch Switch Button Module