Technic Data: 1. Sound alarm: fever/beep alarm when system problems happened 2. Unit: °C/°F can be changed by pressing button 3. Measure time: one second 4. Auto shut-off: 60 seconds without operation 5. Battery: CR2032 x 1 6. Battery lifespan: approximately 1,000 times, inspect low voltage of battery at anytime 7. Operating temperatures: 5.0 to 40.0°C (41 to 104°F), ?80% RH 8. Storage temperatures: -20.0 to 55.0°C (-4 to 131°F), ?95% RH 9. Dimensions: 114 x 34 x 26mm 10.Weight: 57g (including battery) Accessories: ?1 x Infrared Thermometer ?1 x Stand 1 x CR2032 Lithium button battery 1 x User's Manual