The TA2K will convert any multimeter with .001 volt DC measurement capability into a dual input temperature tester! Temperature (either °F or °C), is converted to millivolts and shows up on your DMM display just as it does on a digital thermometer. This adapter plugs directly into DMM's that use industry-standard 4mm jacks. It includes differential mode, which is great for checking air conditioning system's superheat and the forward-facing control panel makes changing modes easy. One year limited warranty.