COMMERCIAL APPLICATIONS: The Digital Refrigerator/Freezer Thermometer with Alarm monitors temperature inside freezers, refrigerators, reach-ins, walk-ins, coolers, warming stations, dishwashers, and other temperature-critical appliances. It alerts with an ble alarm when the temperature is out of range. PROGRAMMABLE ALARM: Set both high and low temperature limits to define the desired range. The loud ble alarm sounds for four seconds per minute when the temperature exceeds the set limits, providing immediate notification of potential issues. DUAL TEMPERATURE MONITORING: This freezer thermometer measures internal appliance temperature as well as ambient room temperature. The Hi-Lo Memory function records the highest and lowest temperatures reached at both locations. The large LCD display shows appliance temperature continuously and can be toggled to view room temperature on demand. EASY INSTALLATION: The display unit has a magnetic back for quick attachment to metal surfaces. Double-sided tape and hook-and-loop strips are included for additional mounting options. The compact remote probe fits discreetly inside the appliance, and the ultra-thin cable easily passes through door gaskets. BATTERY POWERED: Operates on one AAA battery (included), which is replaceable from the front of the unit without removing it from its mounting location. COLOR: White MATERIAL: ABS plastic RUGGED CONSTRUCTION: Built with durable ABS plastic that can be cleaned with a damp cloth. The external probe and cable are waterproof and designed to withstand continuous exposure to water, freezing conditions, or contact with soil. PACKAGE CONTENTS: 1 x Thermometer Note: Light reflection and differences in display screens may cause slight variations between the color shown in the image and the actual product. Measurement accuracy allows for a tolerance of +/- 1-3 cm.