Summit Compact All-FreezerFEATURES Commercially approved ETL S listed to NSF 7 commercial standards NIST calibrated temperature display Thermometer provides continuous display of the current and high low temperature to the nearest tenth of a degree, with a readout switchable from Celsius to Fahrenheit at the touch of a button High low temperature alarm Audible alarm sounds if the interior temperature rises or falls out of set range Compact dimensions Sized for easy use on top