SincereetaliDescription: This is a wireless digital freezer thermometer. It can be used in the freezer and also act as an indoor and outdoor thermometer. Its audible alarm can warn you of the exceeded temperature in time. Features: * It can be used in the freezer and also act as an indoor and outdoor thermometer. * The minimum and maximum temperatures are displayed on the LED screen and can be reset manually. * With indoor and outdoor audible alarm. When the temperature exceeds your preset minimum and maximum alarm setting, it will emit an audible alert. * Includes Min and Max temperature records and you can easily monitor the temperature change of your refrigerator and provide double protection for your food safety. * With a temperature trend indicator arrow and daily high and low information. * Comes with a hanging hole so the display can be wall-mounted or stand on the table. How to install: The sensor is equipped with a spring clip with a plastic handle to be firmly attached to the edge of a shelf. The display can be mounted by magnet on a refrigerator or use the integrated keyhole for wall mounting. Note: Do not install the battery reversely. Do not place the receiver near metal. Avoid the transmitter directly under the rain. Specification: Material: ABS Update Rate: 10 seconds Indoor Temperature Range: 0-50 (32-122) Outdoor Temperature Range: -40-60 (-40-140) Power Supply: 2 x AAA batteries for host (not included), 2 x AAA batteries for sensor (not included) Color: White Host Size: 10.0 * 8.5 * 2.0cm / 3.94 * 3.35 * 0.79in Host Weight: 100g / 3.52oz Sensor Size: 10.5 * 3.5 * 3.0cm / 4.13 * 1.38 * 1.18in Sensor Weight: 39g / 1.36oz Package List: 1 * Host 1/2 * Sensor (Optional) 1 * User Manual