Product information: Product Categories: Internal power supply equipment BF type application part Units of measurement : oC&Fkey to switch Range 34.0°℃~43.0°C Range Indicator : 34.0℃ Show Lo,>43.0°C Show Hi Accuracy: <35.0°Cand >42.0°℃: ± 0.3C 35.0°C~42.0°C: ± 0.2°℃ Measuring position: Forehead Measuring interval: About 6s he ambient temperature exceeds: ≥40.0°C:show Hi < 10.0°C:show Lo Buzzer frequency: About 4Khz Automatic shut- down : 60 seconds after no operation Low Voltage Tips: <2.4 ± 0.4V，Battery symbol flashes Memory function: Save last measured 12 memories (without memoryLo/ Hi) Operating Voltage: DC 2.4~3.3V Working current : Standby:< 2uA,Power:<5 mA (VDD=3.0V)Without backlight Battery : 2x 1.5VAAA Tri-color backlit: <37.5C Green 37.6°C~38.0C Yellow ≥38.1℃ Red Normal operating conditions: Ambient temperature: 16C~35C Relative humidity:<85% Atmospheric pressure:70kPa~106kPa Size 140mmX38mmx 33mm (LxWxH) N.W. : 50g Duration of use : 5years Packing list: The thermometer x1