Features 1、2 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 ‑50℃～110℃. Suitable for general temperature measurement 3、LARGE SCREEN DISPLAY: Provide large screen display, the value is clear at a glance. Working voltage is 1.5V 4、UNDERWATER DETECTION: 4x20mm copper nickel plated waterproof probe can be used for underwater detection, very practical 5、WIDELY USED: Very suitable for use in refrigerators, freezers, incubators, brooders, cigar humidifiers, reptile tanks, 3D printers, solar systems, cellars, etc. Specification Item Type: Electronic Digital Thermometer Material: ABS, copper Purpose: Suitable for general temperature measurement Temperature Measurement Range: -50℃~110℃ Operating Temperature: -5-50℃ (display) Probe: Approx. 4 x 20mm / 0.16 x 0.79in copper nickel plated, waterproof probe Operating Humidity: 5%～80% Working Voltage: 1.5V Temperature Sampling Period: 2 Seconds Machine Size: Approx. 4.8 x 2.86 x 1.5cm / 1.9 x 1.1 x 0.6in Embedded Opening Size: Approx. 4.6 x 2.7cm / 1.8 x 1.1in Temperature Error: ±1℃ at room temperature Battery Type: 2 x AG13 (not include) Probe Cable Length: Approx. 1meter / 3.3ft Package List 2 x Electronic Digital Thermometer