Don’t you hate it when you’re crunching through this numbers in the wee hours of the night and then you have to keep switching your hand placement from the numpad to your mouse and back? “No longer!” proclaimed Sanwa, as the company has produced a computer mouse with a calculator built right into it.

Well, it’s not quite a full-fledged calculator, but it’s got all the main numerical keypad buttons on it to let you crunch through those tax numbers with the best of them, significantly increasing your number-crunching proficiency. You’ll also notice that there’s a button there for double-zero.

The Sanwa keypad mouse, as it has come to be known, does its mousing via an 800 dpi optical sensor. For $89, you would think that they’d at least do laser. And cordless.