5Pcs 2.7V-6V Green HTTM Series Capacitive Touch Switch Button ModuleFeatures: 1. No mechanical components, don't wear out, an infinite life, reduce maintenance cost; 2. Its sensing part can be placed into any insulation layer (usually a glass or plastic material), it is easy to make and surroundings are sealed the keyboard, to play the role of moistureproof and waterproof; 3. The panel design is follow one's inclinations, arbitrary button size, shape, design, characters, trademarks, such as the perspective window