The thermometer has an easy to read LCD display and is small and compact for discrete use. Attach the display unit to the outside of the tank using the suction cups and submerge the probe into the water in the tank. The thermometer is accurate enough to create readings within 0.1 degree. Makes caring for fish even easier, get one today and save Features - Measuring range: -50 + 70 . - Resolution: 0.1 . - Accuracy: 1 . - Power source: 1.5V. - Button battery (LR44). - Machine size: 58 37 16mm. - Display size: 26.5 13.5mm. - for Aquarium or terrarium temperature monitoring. - Easy-to-read LCD displays temperature in Fahrenheit or Celsius. - Enjoy convenient monitoring of parameters essential to Fish and reptile health. - Attach the display unit to the outside of the tank using the suction cups and submerge the probe into the water in the tank. - The thermometer is accurate enough to create readings within 0.1 degree