TEMPERATURE AND HUMIDITY METER: The handheld digital thermometer features a high-sensitivity sensor with a dew point temperature range of 14 to 140°F (-10 to 60°C) and relative humidity (RH) range of 0 to 100%; Requires 3x AAA batteries (not included) ACCURATE SENSOR: Precise temperature and humidity readings with resolution of 0.2°F (0.1°C) & 0.1% RH; Accuracy of +/- 2°F (+/- 1°C) & +/- 5% RH; Change temperature units & min/max readings with a button press EASY READOUT: Features a large-font display for quick, at-a-glance readings, with a data hold function to keep measurements visible, and optional backlight for use in low-light conditions; 5-min auto-off feature maximizes battery life APPLICATIONS: Monitor the performance of cooling systems and other equipment in real-time by tracking the ambient conditions they operate in; Ideal for use in server rooms, data centers, office environment control, and equipment testing PORTABLE: Compact and lightweight thermometer and hygrometer teste