1. Key: It is with digital key and 6 function keys, and use port printing-brush SUS304 stainless steel material.

2. Design of the key: Square Key with character of laser engraving and corrosion.

3. Key Size: 13.8mm*13.8mm,13.8*27.8mm；

4. Key`s travel :0.5mm

5. Lifetime of the key: Operating more than 2Million per key.

6. Strength of the key: 1.2N+/-0.1N (Contact with strength)

7. Front Panel: import printing-brush SUS304 stainless steel with 1.5 thickness.

8) Electric parameter:

1. Operating current: Direct current+5V/-5%

2 working current:20mA

3 Expected life-time:>5yer

4. Button switch technology: Rubber key

5. Interface Technology:USB,PS2,R232,8PIN

6. Operating System:DOS/Windows95/98/NT/ME/2000/2003/XP/Vista, Linux, Unix, Mac osx

7. Waterproof grade:IP65

9) Environmental adaptation:

1. Operating Temperature:-20℃to+60℃

2. Storage Temperature:-30℃to+70℃

3. Relative Humidity: 30-90% without Condensation dew

4. Atmospheric Pressure:50-100Kpa

5. IP Level : IP65( static state ) / IP (Dynamic state)