Press a button to display temperatures from 10xB0F to 140xB0F (-23xB0C to 60xB0C) in either Fahrenheit or Celsius. Graduated 0.1xB0 increments reveal temperature trends long before they can harm pets. Equal accuracy is achieved in both aquatic and terrestrial environments, simply by positioning a temperature probe (attached to the thermometer by a 39 inch lead wire) in the spot to be monitored. Keep the lead out of sight by securing it with the included suction cups. Choose constant temperature monitoring, or turn the unit off to save battery power (a battery is included).