1. Voltage: DC 5V
2. Current: <=60mA
3. Number of keys: 21 keys
4. Key life: >=50 million times
5. Key structure: mechanical black shaft
6. Interface: USB
7. Dimensions: 139.5x103x25.9mm
8. Cable length: 1.5m
9. Applicable: bank securities/industrial computer/financial accounting, etc.