The UNI-T A12T is a compact, portable digital temperature and humidity meter. 1  It features a large LCD screen for easy reading of real-time temperature and humidity values. 2  It can be used for both indoor and outdoor measurements and comes with an external sensor probe for measuring temperature in two locations simultaneously. 2  Additional features include a 12/24 hour clock, an alarm function, and a comfort level indicator based on the temperature and humidity readings. 3  It also has options for wall or table mounting.