... 2.100% function test 3. Waterproof Membrane Switch Keyboard for Micro-wave Oven Advantages: 1.Beautiful appearance, rich and ... . Tightness is good, moisture-proof, dust-proof, waterproof, anti-oil, anti-corrosion and erosion of harmful gases proof, acid and alkali proof ... with other special requirements, such as Shielding, Windows/Lens Coating, Embossing, Embedded LEDs, UV glossy/matte/textured, etc.