Feature:  
Designed for Windows 98, 2000, ME, XP.  
88/89 keys keyboard with embedded numeric keypad and 12 dedicated function keys.  
Full functions of 104/105 key enhanced layout.  
Bulit-in touch pad for pointing input device.  
Glide your finger to move cursor.  
No contact force required.  
Use the buttons like mouse buttons  
Tracking speed up to 40 inches per second.  
Elegant wrist pad for comfortables support and rest.

Specification: 
Interface: PS2 (or USB interface)  
Travel distance: 3.0 +/- 0.3mm  
Travel to peak: 1.0 +/- 0.2mm  
Peak force: 50 +/- 10gm  
Operating temperature: 0 to 55 degree C  
Storage temperature: -20 to 65 degree C  
Operating humidity: 10% to 95% RH  
Switch life: 5 million life cycles  
Electronic data: +5VDC +/- 5% 100mA 

Dimension
(without palm rest): 289(L)x226.6(W)x27(H)mm;
Weight: 0.72kg