Specifications: 1. Sound alarm: fever/beep alarm when system problems happened 2. Unit: °C/°F can be changed by pressing button3. Measure time: one second4. Auto shut-off: 60 seconds without operation5. Battery: CR2032 x 16. Battery lifespan: approximately 1，000 times， inspect low voltage of battery at anytime7. Operating temperatures: 5.0 to 40.0°C (41 to 104°F)， ≤80% RH8. Storage temperatures: -20.0 to 55.0°C (-4 to 131°F)， ≤95% RH9. Dimensions: 114 x 34 x 26mm10. Weight: 57g (including battery)