Detailed Product Description Specifications: 1) Material: high quality forged aluminum or zinc alloy 2) Keypad: 4 x 4 matrix, anti-vandalism, operation in hostile environments with water and dust resistant features 3) Tactile feel with subtly plated finish 4) High definition with laser engraved letters 5) Ease of customizing with multiple languages 6) Lifespan: > 800,000 times actuation 7) Weight: about 0.6kg OEM/ODM orders are welcome.