Multi Fonction:The non contact infrared thermometer can measure MAX/ MIN temperature , figure out the difference between the MAX and MIN (DIF ),average temperature(AVG). High / Low Temperature Alarm : When reading over the high or low temperature threshold value you set,LCD screen HI /LOW icon remind you with BiBi audio sounds. Highly Accurate:The the infrared temp gun thermometer with OFFSET function ,Zero offset adjustment, highest accuracy up to ±1.5%,Emissivity 0.10~1.00 Adjustable (0.95 Preset),Response time 500 mSec, 95% response,0.5s rapidly and accurately measured of object surface temperature. Easy To Use :With backlight, makes it more easier to know the data at a glance. °C/°F conversion,Data Hold ,Low Battery Indication,12:1 Distance Spot Ratio. Widely Used(Not for People):Temperature measurement range -50~550°C(-58~1022°F).the Wintact WT550 laser temperature gun can be used for the temperature measurement of AC vents,Iron Industry,car engines,food,oil,water surface, electrical engineering etc. This non contact infrared thermometer gun is used for measuring the temperature of the object's surface, which is applicable for various hot, hazardous or hard-toreach objects without contact safely and quickly. NOTE: The measured temperature for humans or animals will not be correct.If you insist, please refer to the instruction manual and other reference objects to complete the calibration before use. Technical Parameter: Temperature range: -50 ~ 380°C (-58~716°F). Accuracy: ±1.5% or ±1.5°C Resolution: ±1% or ±1°C Distance Spot Ratio: 12:1 Emissivity: 0.95 (fixed),0.8(optional) Resolution: 0.1°C/0.1°F Red Laser Power: less than 0.5 MW Power supply: 2 x AAA battery (included) Features: 1. Precise non-contact measurement,fast and easy to operate. 2. Backlight LCD display screen,super strong light. 3. Automatic measurement range selection with resolution of 0.1°/0.1°. 4. Max/Min record,auto power off,low battery indication,data hold. 5. C°/F° selection. 6. Self calibration function: if the temperature is 26.3°C and the temperature value measured is 25°C,then and 1.3°C should be increased as a calibration value,customer can calibrate the infrared laser thermometer between -5.0°C and +5.0°C. 7. The infrared thermometer gun turns off automatically if there is no further operation within 20 seconds,no power on/off key. 8. With non-contact technology,the ir thermometer can be used to measure the surface temperature of hard-to-reach objects. 9. Widely used in food preparation,air conditioner temperature tester,safety and fire inspection,plastic molding,asphalt,marine,printing ink and dryer temperature,diesel and fleet maintenance.