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main features | 1. frame and keys made of stainless steel,highly vandal resistant |
2. dustproof,weatherproof,anti-explosion,hard to disassemble | |
3. double-sided board,metal dome circuit, reliabled contact | |
technical parameters | 1. life span ≥ 2 million |
2. elasticity of key: 2N-3N | |
3. traveling distance: 0.45mm | |
4. character of the key's surface:laser mark and a heavy painting | |
5. LED voltage:3V | |
environmental adaption | 1. operate temperature: -25~+65°c relative humidity:30-90%RH |
2. storage temperature: -40~+85°c relative humidity:20-95%RH | |
3. defend grade:IP65 |