Warm Tip: Dear buyer, Due to lighting effect, monitors brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand Thank you The wireless refrigerator thermometer includes 1 indoor temperature built-in the console and 1 remote sensor, which can monitor indoor and outdoor temperature. When indoor or outdoor temperature exceed your pre-set minimum and maximum alarm value, the thermometer will make audio alarm to remind you, allowing you to be aware if adjustments are necessary for your household. Features - Color: White. - Material: Plastic - Size: About 9.8x8.5x2.2cm - Temperature Range: Outdoor -40C to 60 C; Indoor 0C to 60 C - Transmission Range Up: wireless sensor without interference up to 100m. - Includes 1 indoor temperature built-in the console and 2 remote sensors, which can monitor fridge and indoor temperature. - Easy to read LCD screen displays the current indoor outdoor temperature. When insufficient electricity, there are will be shown on the LCD screen. - With a temperature alarm, auto alarm while exceed set temperature. - Display stands upright for tabletop use or is wall-mountable. - Includes 24 hours high and low records for temperature. - The display console displays temperature,minimum and maximum temperature, which can be reset manually. - Powered by 2 AAA batteries(Host, not included) and 2 AA batteries(Remote sensor, not included). - Note: The sensor is not waterproof, so please keep it away from rain.