Control Traceable 4648 Jumbo Display Vaccine Thermometer with 5ml Round Bottle, -50&deg;C to 70&deg;C (-58&deg;F to 158&deg;F) Range, 0.1&deg; Resolution Jumbo, triple display Bottle probe for refrigerator applications Out-of range alarm Alarm feature provides alert when temperature rises above or falls below a set point. Alarm is programmable in 1 increments. Ten-foot micro-cable permits refrigerator doors to close on it