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: S—single button, D—double button, T—three button, F—four built; ◇ → Version Attributes: C—Normal Edition, S—Special Edition (customized version); △→ Backlight Color: B—blue, R—red, G—yellow green Working Voltage: +2.7~6V Working Temperature: 30～+70°C OUT Pin Output Voltage: +3.3V ± 0.1 VOUT Pin Maximum Output Current: 500mA Operating Temperature Range: -30 ~ +70 ° C Wide Voltage Input Range: +2.7V～+6V Signal Output: +3.3VOptional Color: Red,Yellow, Blue, Green . Package List: 1 x Switch Module1 x Screen