Package includes: You will receive 2 digital thermometers that accurately measure your pet's temperature and humidity, ideal for daily use and replacement to help monitor your pet's environment. Accurate monitoring: These digital thermometers and hygrometers provide accurate readings within 1C and 5% RH. Data is displayed for approximately 10 seconds, allowing timely monitoring of conditions in aquariums or reptile enclosures. Probe design: Each thermometer features an extended probe to easily measure temperature and humidity. The sensor probe comes in a protective case and includes a strong suction cup for secure mounting. Easy to install: The thermometer has a retractable clamp on the back for attachment to acrylic or glass surfaces, as well as a magnetic design for mounting on metal surfaces. Requires one AAA battery (not included) for operation. Storage range: The device automatically records the maximum and minimum temperature and humidity. Indoor temperature range: -10C to 50C (14F to 122F). Outdoor temperature range: -50C to 70C (-58F to 158F). Humidity measurement range: 10% to 95% RH.