Consolidated Leo posted:"Protometer" is just the name of the product (a registered trademark). It can be hooked up to a USB port for data logging. Pretty neat!
There seem to be a number of versions. Here's a link to a pdf:
Too harsh replies I think...
Actually it seems to have a specific purpose, namely breadboard use. It seems great for that, rather than fussing with a meter that wants to lay flat and probes that won’t fit in breadboard holes. Could use MA and OHMS though.