... , such as Shielding, Windows/Lens Coating, Embossing, Embedded LEDs, UV glossy/matte/textured, EL,LED backlingt,rubber keypad etc.The ... tactile feel 4. Pre-assemble with or without metal domes 5. Water-resistant, dust-proof, gas-proof and scratch-resistant ... erosion of harmful gases proof, acid and alkali proof, quakeproof. 5. Low cost, high lifespan, membrane switches design and manufacture ...