This just warms the cockles of my geeky heart. What a cheerfully eccentric device. I wish it was available back in the old days when we used to use gold and weighed it out carefully. Now I am unaware of anything in the dental office we need to weigh on a regular basis.
The mouse functions as a regular two-button, USB mouse until you open its cover, which reveals a precise scale with a range of 0.1 to 500 grams
via Mouse Doubles as a Precise Scale for All Your Weighing Needs.