Specifications: You just submerge probe into fish tank to measure water temperature. This hygrometer has Large LCD screen with big digits, and you could read the data easily. High precision thermometer measures temperature accurately. Type: Thermometer Hygrometer Material: Acrylic Temperature Meter Range: -50 Degree Celsius-70 Degree Celsius Temperature Meter Accuracy: +/- 1 Degree Celsius Humidity Meter Range: 10% - 99% Humidity Meter Accuracy: +/- 5% Humidity Meter Cycle: 10 Seconds Battery: 2 x LR44 Button Battery (Not Included) Rated Voltage: DC 1.5V Features: Precision, Temperature Humidity Meter, Digital, with Probe Probe Length: 1.5m/59.01" (Approx.) Size: 4.5cm x 4.5cm x 1.55cm(Approx.) Notes: Due to the light and screen setting difference, the color of item may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Thermometer Hygrometer