Ideal for use in aquariums, terrariums, indoor, outdoor, refrigerators. Specification: Measurement accuracy: ±1°C. Display resolution: 0.1°C. Measuring Temperature Range: indoor：-10℃～50℃（+14℉～+122℉）; outdoor：-50℃～+70℃(-58℉～+158℉) Power supply:1.5V (AG13) x1 (Included) Size:65*59*18mm Functions: Indoor/outdoor temperature display highest/lowest outdoor temperature alarm function Temperature unit ℃/℉ changeable Memorized MAX/MIN values of indoor/outdoor temperature Frost point alarm: -1℃～+4℃(+30.2℉～+39.2℉) LED alarm indicator light How to Operate 1.Press [AL] can open the temperature alarm mode, when bell appears on the screen??temperature alarm opened??no bell, the temperature alarm mode closed. 2.Press the [AL] key for 2 seconds to enter the highest/ lowest temperature alarm setting state. When the value flashes, press [ADJ] to adjust the value, then press [ADJ] to ensure the settings (first set the highest temperature and then set the lowest temperature); 3. when the temperature alarm mode is turned on and no highest/lowest temperature setting operation, the default setting is frost point alarm -1℃～+4℃(+30.2℉～+39.2℉). 4.IN/OUT Key: Inner and Outer(Fridge or outdoor) Temperature Conversion (Must insert sensor cable). 5.MIN/MAX key: When it works, it will detect the max/min temperature automatically; AL key: set the alarm temperature range, open the alarm function; 6.ADJ & ℃/℉ key.ADJ adjust the value under setted or change temperature unit between Celsius (℃) and Fahrenheit (℉). Package included: 1 x Refrigerator Thermometer (With battery) 1 x User Manualsert. If show HHH, pls take out the probe and reinsert
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