The function Digital Thermometer has the advantages of low battery consumption, high stability and accuracy, memory of last measure, 15 minute auto shutdown, temp data hold, overtemperature setting, and wide temperature range from -50°C to +250°C (-58°F~+482°F).Display accuracy: one digit after decimal pointMemory of last measure: after startup, the last measure will be displayed automatically for 1.5 second. Following that, the themometer will shift into the temperature measuring mode automatically.Indoor Thermometer powered by one 357A button cell.Low battery sensation and indication: when the battery power is deficient (lower than 1.3V). The icon "LOW BAT" will be displayed in the LCD display.Auto shut down for energy saving (option): the Air Thermometer will shut down automatically after no any operation has been performed for a streak of 15 minutes.Last measure hold: press the "HOLD" key, display of the last measure will be held, unless the HOLD function is on, "HOLD" will be displayed in the LCD.Comes in a wrist string plastic case.Feature:Working voltage: 1.5VTemperature resolution: 0.10/°FAccuracy: 0.0°C to +80°C(± 1 or 2°F)Other range: ±5°C-10°C or ±10°F-20°FMeasuring frequency: 1 sec, 10 sec,sleep,auto select.Major functions available:Outdoor Thermometer measuring range: -50°C~+250°C)-58°F~+482°F)Memory of last measureLow battery sensation and display15 minute auto shutdown for power saving (option)°C and °F display selectable