Focket Digital ThermometerElectronic LCD High Accuracy Temperature Meter Wired Double Meter Probes Sensor with Time Display for RefrigeratorAir-Conditionetc

Specifications: Condition: 100% Brand New Timer Display Range: 1:00-12:59 Temperature Range: -50?~+70? (-58?~+158?) Accuracy: +/-1? Temperature Higher Than -20? Resolution: 0.1? Temperature Lower Than -20? Resolution: 1? Power Supply: 1Pc AAA Battery (Not Included) Size: Approx. 118 x 30 x 28.5MM / 4.6 x 1.2 x 1.1inch Package Weight: 50g         Operation Instruction: 1. Open battery cover on the device, place AAA battery in correct electrode. FSW is function conversion key, IN means indoor temperature display, Out means outdoor temperature display. 2. When starting up, after LCD full screen displays 2 seconds, LCD displays current indoor temperature. During the period of LCD displaying 2 seconds, function key won't switch state. 3. If continuously press FSW function key over 4 seconds, device will shut down, while clock time maintain counting. 4. When temperature not lower than 70?(158?) in measurement, LCD will display H?(?) in radix point first place, if temperature is lower than -50?(-58?), LCD will display L?(?) in radix point first place. ?/? is Celsius/Fahrenheit switch. 6. Time Setting: (1) Press FSW key to change LCD to time display. (2) Hour setting (HR key): add 1 hour per press, over 12 then counting from 1. (3) Minute setting (MIN key): add 1 minute per press, over 59 then counting from 00 A is built-in sensor probe for detecting in door temperature around. B is outside sensor probe, place it in the place where need to be measure  temperature, the LCD will display temperature data. Package Included: 1 x Thermometer (without battery)