2Packs Digital Freezer Thermometer Fridge Temperature with Alarm, Backlight, Magnet, Power On/Off, Max/Min for Home, Restaurants, RV, External Sensor, AAA Battery(2)

【Fridge/Freezer Temperature Monitoring】Ensure food stays fresh! Place the sensor in the center of your fridge/freezer (don't stick it to doors or items—causes errors). The magnetized main unit attaches to the outside. Avoid pulling/bending the sensor cable. 【Water Tank Temperature Monitoring】Keep your aquatic pets and reptiles comfortable! This thermometer with remote sensor accurately measures water temp in tropical fish tanks, goldfish aquariums, and enclosures for bearded dragons, geckos, etc. Place the waterproof sensor directly in water or the habitat—keep the main unit dry (it's not waterproof). Note: Not for seawater use. 【High/Low Temperature Alarms with Mute Option】Customize high and low temperature alarms. The thermometer will beep when temperatures exceed set thresholds. Mute the alarm in quiet spaces (bedrooms, offices) and use LED lights for alerts instead. 【Handy Features】Backlight stays on for 10 seconds for visibility in dark areas. Power off when not in use to conserve battery life. Low battery indecator & celsius/fahrenheit switch display. Max/min temp memory with 24-hour/full-period data storage for historical reading review. 【Durable for Daily Use】Runs on 2 AAA batteries for months; waterproof external sensor withstands home fridge condensation or restaurant spills. Built to handle constant openings in family kitchens or high-traffic commercial freezers without missing a reading. 【Specifications】Main Unit Dimensions: 8.8cm x 6.5cm x 2.3cm (3.46" x 2.56" x 0.91"), Temperature Range: -10°C to 50°C (14°F to 122°F). Sensor Cable Length: 100cm (39.37 inches), Temperature Range: -50°C to 90°C (-58°F to 194°F). Measurement Accuracy: ±1°C/2℉.