Temperature tester, precise LCD display sensor for audible alarm trigger for home use

1. Refrigerator thermometer: you can use it in the refrigerator, freezer, or outdoors to ensure safe food storage. 2. The indoor temperature range is 10℃-60℃ (22℉-140℉), and the outdoor temperature range is 40℃-60℃ (40℉-140℉). The transmission range is 100m/32ft (open area). 3. It can be placed on a table, hung on the wall, attached to the refrigerator, and the wireless sensor can be attached to the door or wall. 4. LCD display: records minimum and maximum temperatures, provides historical temperature readings, and monitors temperature changes. 5. Six function keys on the main unit and a signal indicator on the transmitter. Press the corresponding key to turn the alarm on/off, switch between ℃ and ℉, and clear the maximum/minimum temperature readings. 6. When the temperature exceeds the preset minimum and maximum alarm settings, the wireless thermometer provides audible and visual alarms. Specification: Item Type: Thermometer Material: Plastic - Electronic Components Weight: Approx. 214g / 7.5oz Thermometer Power Supply: 2 AAA Batteries (Batteries Not Included) Transmitter Power Supply: 4 AA Batteries (Batteries Not Included) Indoor Temperature Range: -10℃-60℃ (22℉-140℉) Outdoor Temperature Range: -40℃-60℃ (-40℉-140℉) Transmission Range: 100m/32ft (Open Area) Thermometer Size: Approx. 9.5x8.5cm / 3.7x3.3in Transmitter Size: Approx. 10.5 x 3.5 cm / 4.1 x 1.4 in. How to use: Install the battery yourself (not included). You can then use and adjust the mode as needed according to the manual. Package list: 1 x Thermometer (battery not included), 2 x Transmitters (batteries not included), 1 x Manual. Note: 1. Please allow a 0-1 inch error due to manual measurement. Thank you for your understanding. 2. Monitors are not calibrated the same way, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 3. Do not disassemble the product freely. 4. Even if the indicator light is dim, please replace the battery. 5. Do not place this product in a place full of heat, humidity, dust, or corrosive gases to avoid damaging the electronic components. 6. When the temperature exceeds the preset temperature, the alarm will not sound immediately. It will compare the temperature after 10 minutes. When the temperature reaches the alarm value, the thermometer will immediately sound an alarm. 7. Please install new batteries to ensure the thermometer's accuracy.