Feature:1. No mechanical parts, no wear, with unlimited life, it can reduce post-maintenance costs.2. The sensing part can be placed behind any insulating layer (usually glass or plastic material), and it is easy to make a keyboard sealed with the surrounding environment to prevent moisture and water.3. Panel pattern can be freely designed, while the button size and shape can be arbitrarily designed, and any combination of characters, trademarks and see-through window can make the overall sense of the product stronger.4. Compared with physical buttons, the touch buttons are less susceptible to damage.5. The output of the adjustment signal can be a latched output or a level-hold output by modifying the resistor on the back side.6. Moreover, such module can be used directly to drive relays, optocouplers, LED lights and other originals.7. Built-in anti-interference algorithm makes it with excellent anti-interference performance.Specification:Item Type: HTTM is the logogram for HelTec Touch Model Number of Buttons: Ssingle button, Ddouble button, Tthree button, Ffour built; Version Attributes: CNormal Edition, SSpecial Edition (customized version); Backlight Color: Bblue, Rred, Gyellow greenWorking Voltage: +2.7~6VWorking Temperature: 30+70COUT Pin Output Voltage: +3.3V 0.1VOUT Pin Maximum Output Current: 500mAOperating Temperature Range: -30 ~ +70 C Wide Voltage Input Range: +2.7V+6VSignal Output: +3.3VOptional Color: Red,Yellow, Blue, Green .Package List:1 x Switch Module1 x Screen