Excellent condition MITS ICT-1800. This may be a variant or later model, as the manual has a copyright of 1972 and has slightly different cosmetics. This model has a different MITS logo, which is located in a different spot. It also does not have the title "IC TESTER" written on it, and the step button is in the center, not under the IC interface. Judging by the black and white photos in the manual, the other model has different colored in/out, ground, and out jack terminals.