It uses an optical link adapter for computer communication. I've got the 867s and it's the same aside from slightly lesser accuracy specs (still 50,000 count with a higher mode) and no included thermocouple. It's a solid meter, physically large, but fully featured and another digit of accuracy on the Fluke 87-V at a much lower pricepoint. Not the best choice if you're hauling it everywhere, but great value for money in terms of basic accuracy and featureset. Only think I wish it had is the low impedance mode for draining caps and such - but I've got a 121GW now too, so no big deal there.