Zebra GK420d Direct Thermal Label Printer with Peeler, PSU, USB Cable and 250 4"x6" labels. In good working order, good print quality. Then press feed button and keep it pressed until green LED blinks twice and release it. Printer will Calibrate itself and after that will be ready for printing. Print darkness can be adjusted by lowering print speed or changing darkness.
For installation instructions on a Mac please watch this video on Youtube.