คำอธิบาย
| Brand | SMILE |
| Model | SM820 |
| Interface | USB Wireless 2.4GHz |
| Sensing technology | Optical |
| Resolution | 800 / 1600 Dpi |
| Buttons | 4 Buttons |
| Cable Length | None |
| Battery Type | 2 x AAA |
| System Requirements OS | All Windows |
| Package Dimension | (W x D x H) : 12.00 x 18.50 x 4.00 cm |
| Gross Weight | 0.09 KG |
| Volume | 888.00 cm3 |
