The Printrbot Assembled Simple Metal 3D Printer uses open source software and connects to the computer using the included mini-USB cable. Using an SD card (sold separately), the printer can be disconnected from the computer after initialization for untethered printing during long print jobs.

The print volume is small, at 4 x 4 x 4 inches, although a $139 expansion unit increases this to 7.2 by 4 by 5.5 inches.