... custom design electronic membrane keypad1. PC /PET as overlay (control panel) 2. Flat keys or tactile type 3. Embossed button ... with or without metal domes 5. Water-resistant, dust-proof, gas-proof and scratch-resistant 6. Long life cycle. Electronic ... installation and connection convenience. 4. Tightness is good, moisture-proof, dust-proof, waterproof, anti-oil, anti-corrosion and erosion of harmful ...