Item Type: Electronic Digital Thermometer_x000D_Material: ABS, copper_x000D_Purpose: Suitable for general temperature measurement_x000D_Temperature Measurement Range: -50~110_x000D_Operating Temperature: -5-50 (display)_x000D_Probe: Approx. 4 x 20mm / 0.16 x 0.79in copper nickel plated, waterproof probe_x000D_Operating Humidity: 5%80%_x000D_Working Voltage: 1.5V_x000D_Temperature Sampling Period: 2 Seconds_x000D_Machine Size: Approx. 4.8 x 2.86 x 1.5cm / 1.9 x 1.1 x 0.6in_x000D_Embedded Opening Size: Approx. 4.6 x 2.7cm / 1.8 x 1.1in_x000D_Temperature Error: 1 at room temperature_x000D_Battery Type: 2 x AG13 (not include)_x000D_Probe Cable Length: Approx. 1meter / 3.3ft 12 SECONDS REFRESH FREQUENCY: Refresh frequency is once every 2 seconds, equipped with 1 meter long probe, easy to use 2?50~110 MEASURING RANGE: Come with small size, measuring range from ?50110. Suitable for general temperature measurement 3LARGE SCREEN DISPLAY: Provide large screen display, the value is clear at a glance. Working voltage is 1.5V 4UNDERWATER DETECTION: 4x20mm copper nickel plated waterproof probe can be used for underwater detection, very practical 5WIDELY USED: Very suitable for use in refrigerators, freezers, incubators, brooders, cigar humidifiers, reptile tanks, 3D printers, solar systems, cellars, etc.2 x Electronic Digital ThermometerThis product is small in size and easy to use, suitable for general temperature measurement. If you have strict requirements on temperature accuracy, please choose carefully.