USB Non-synchronous Notebook Computer Numeric Keyboard with 19 Keys

Features: 1. Ultra-thin computers caps design, Aesthetic appearance 2. Durable structure, long life 3. Non-synchronous digital input, no affection to the other keyboard Specification: 1. Button design: 19 bonds 2. Key trip: 3.0 +/-0.3mm 3. Surcharging height: 0.25+/-0.05mm 4. MAX pressure: 55+/-5g 5. Operating temperature: 0-55 degree C 6. Key life: 800milliomon and above 7. Products size: 100*140*15mm