USB Non-synchronous Notebook Computer Multi Function Keypad with 19 Keys, Multi Function Keypad

1. Ultra thin notebook computers caps design, Aesthetic appearance.
2. Durable structure, long life
3. Non-synchronous digital input, no affection to the other keyboard
4. Button design: 19 bonds
5. Key trip: 3.0+/-0.3mm
6. Surcharging height: 0.25+/-0.05mm
8. MAX pressure: 55+/-5g
9. Operating temperature: 0~55 degree C
10. Key life: 800 million and above
11. Product size: 100*140*15mm