| Model | D-8501A |
| Size | 110*24mm (front panel), 120*40mm （Rear Panel） |
| Number of Keys | 4 keys |
| Material | stainless steel |
| Key travel | 0.4mm |
| key switch lifespan | more than 2 million operations |
| Keyswitch technology | silicone switching |
| Key graphics | laser-engraved legends & characters in a durable paint |
| Mounting style | rack mount |
| Supply Voltage | +5V DC +/-5% |
| Communication interface | Matrix,USB or PS2,RS232 (optional) |
| Protection Level: | IP65(front panel) |
| Operating temperature | -40 ~+70 |
| Storage temperature | -50 ~ +80 |
| Certificate | CE FCC RoHS Compliant |
| OS support | DOS/Windows95/98/NT/ME/2000/2003/XP/Vista/7,8,10 Linux, Mac,etc |
| MTBF | >50000H |
| MTTR | <30min |
| APPLICATION | Self-service kiosk, Industrial PC system, Medical & Food industry, CNC machine & Vending Machine. |
