Fisherbrand™ Traceable® Digital Refrigerator / Freezer Thermometer with Alarm Fahrenheit / Celsius -58° to +158°F (-50° to +70°C) Bottle Probe Door / Wall Mount Battery Operated (639044_EA) 1/EANontoxic glycol solution in bottle insulates sensor from rapid temperature changes when door is open. Triple display shows high, low, and current temperatures, and minimum maximum feature monitors high and low readings for any time period. Alarm feature provides an alert when temperature rises above or falls below a setpoint. 10 foot microcable permits refrigerator doors to close on it. Hook and loop fasteners and magnetic strips are provided for