Mini Lcd Digital Thermometer For Freezer Refrigerator Fridge Aquarium Temperature Meter -50~70 Degree Probe Sensor [...]

Feature Measurement range: -50~ 70 Precision: +1(10~40) Resolution: 0.1(>-20) 1(-20) Battery: LR44 1.5V *1 How to use Short pre to turm on the product,then LCD display the indoor temperature. pre the FSW once again, the LCD switch display the outdoor temperatue. then pre the FSW to enter into the alarm clock mode. pre the HR to set up the hours, pre MIN to set up the minutes. long pre for more than 4 seconds to turn off the product.