I always find myself having a hard time doing calculations on my PC or laptop (especially my laptop since it does not have a number pad). But the plus/minus signs make it hard for me to do calculations; after all, we got pretty convenient with the common calculator pad.
This Illuminated Mouse Pad Calculator With USB Hub will not only make it easier for you to see the keypad during nighttime (because as the name says, it illuminates in the dark), but it will also make it easier for you to click on the numbers and signs on your mouse pad/calculator.
The calculator has an on/off switch and can be plugged in with a 5-volt power adapter. It includes three different ports for your USB while the mouse pad section gives a nice blue glow for those who enjoy shiny objects.
You can purchase this Illuminated Mouse Pad Calculator With USB Hub for $17.99 at Gizfever, but that does not include the power adapter. I daresay this is perfect for accountants and all those profession whose primary work is to add and multiply big chunk of numbers.