1) Roll a roller for scrolls technique,
two directions scrolls arbitrarily
2) Comfortable key touch, the finger
won't be tired after long time using
3) Key life span: 3,000,000 times
4) PS/2, USB, Combo (U+P) ports available
5) Resolution: 800dpi (3000 frames/second)

Size: 7.5 (L) x 4.5 (W) x 2.4 (H) cm

Packing:
White box or gift box or blister packing