1. Key frame uses zinc alloy material.
2. Buttons are made of high quality zinc alloy, with a strong anti-destruction capability.
3. With natural conductive silicone rubber -weather resistance, corrosion resistance, anti-aging.
4. Double side PCB with golden finger, resistance to oxidation.
| Item | phone number pad |
| Input Voltage | 3.3V/5V |
| Waterproof Grade | IP65 |
| Vandal roof Grade | IK09 |
| Working Life | More than 1 million time per key |
| Key Elasticity | 250g/2.45N |
| Key Travel Distance | 0.45mm |
| Working Temperature | -25℃～+65℃ |
| Storgage Temperature | -40℃～+85℃ |
| Relative Humidity | 30%-95% |
It is mainly for industrial telephone, security system and some other public facilities.
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