Feature: ☑【2 Wireless Sensors】 Built-in the console and 2 remote sensors, the wireless fridge thermometer can display indoor temperature and 2 groups of outdoor temperature simultaneously. You can put the sensor in the refrigerator or outdoor. ☑【Audio Alarm】The wireless thermometer set the alarm max & min temperature.The base will ring once the temperature is higher than the max or lower than the min set temperature. ☑【Easy to Read Display】The LCD screen with large digit.Records Min and Max temperature provides the historical temperatures readings. With this feature, you can easily monitor the temperature change of your refrigerator and provide double protection to your food safety. ☑【Wide Range】The indoor/outdoor thermometer range: Indoor -10℃~ 60℃ (14℉~ 140℉), Outdoor -40℃~ 60℃ (-40℉~140℉ ) and the transmission range is 100M/328ft(open area). You can use it in the fridge, freezer or outdoor, which provides safe food storage. ☑【Multiple Installtion Ways】The wireless thermometer is easy to install. The display unit can stand on the table, hang on the wall, magnet on the refrigerator. The wireless sensor can clip on door or hang on the wall. Specifications： Update Rate: 10 seconds Indoor: 32 ℉ ~ 122℉; Outdoor: -40 ℉ ~ 140℉ Size of Base: 5.91"x3.38"x0.82"inch Size of Sensor: 5.12"x1.57"x0.78" inch Package Included: 1 x Main Unit 2 x Transmitters 1 x User Manual Note: -While the indication is blurring, please change the battery. -Don’t put this product in the place where it is hot, humid, dusty or full of corrosive gas, in case that its electronic components are damaged. -It will not alarm at once when temperature exceeds pre-set. It will compare the temperature after 10 minutes. And when temperature reaches alarm value, the thermometer will alarm immediately. Manufacturer Information: Company: BLACKSTONE ELECTRONICS CO LIMITED Address: UNIT D12 ON 16TH FLOOR JING HO INDUSTRIAL BLDG NOS.78-84 WANG LUNG ST TSUEN WAN NT Email: black_stoner@outlook.com Tel: +8618123753837