700 Infrared Thermometer Handheld LCD Digital Temperature Gun Non Contact Portable Industrial Thermometer Item Type: Industrial Thermometer Model: 700 Material: ABS Battery: 1 x 6F22 9V (Battery Not Included) Application: Temperature measurement of industrial objects Temperature Range  -50℃~750℃ (-58℉~1382℉) Accuracy 0℃~750℃ (32℉~1382℉): ±1.5℃ (±2.7℉) or ±1.5% -50℃~0℃(-58℉~32℉): ±3℃(±5℉) Resolution 0.1°C or 0.1°F Repeatability 1% of reading or 1℃ Response Time 500mSec, 95% response Response Wavelength 8~14um Emissivity 0.10~1.00 adjustable (default 0.95) Object Distance Ratio  12:1 Temperature Operating Range 0~40℃ (32~104℉) Relative Humidity 10%RH~95%RH non condensing, until 30℃ (86℉) Storage Temperature  -20~60℃（-4~140℉） How e: Quick temperature measurement: (1) Open the battery door and insert the battery (2) Pull the trigger to boot (3) Use the positioning laser to aim at the surface of the object to be measured (if laser positioning is not required, it can be turned off). After pulling the trigger, the temperature will remain displayed on the LCD. 1. Laser dot and background light (when the backlight is turned on, the key operation has the function of turning off the backlight after 10 seconds) 2-5 function keys: press the MODE keyboard, the bottom of the LCD will flash and display Maximum-MIN-DIF-AVG-ST0-EMS, press the SET button to select the function. (This machine has a mode memory function, the next time it is turned on, the same measurement mode will be displayed.) a. Maximum: The maximum value of the measured data b. MIN: the minimum value of the measured data c. DIF: Based on the measured value after pressing the SET key, the difference between the measurement and the reference value d. AVG: The measured value is the reference, the difference between the measurement and the reference value e. HAL: When the high temperature alarm is selected as HAL, press the ▲/▽ key to set the alarm temperature point, and press the SET key to confirm: when the measured temperature is greater than the set point, the HI symbol will be displayed and "BI, BI." f. LAL: Once the low temperature alarm is selected to ST0, press the ▲/▽ key to set the low temperature alarm point, and press the SET key to confirm: when the measured temperature is lower than the set point, the LOW symbol will be displayed and the sound "B1.BI." g. STO: When the storage function is selected as STO, press the SET key to confirm the display lock and DATA and 1- symbol, and then measure the temperature, press STO/CAL to save the record. And immediately go to 2 to store a total of 12 measure temperature. Read out the storage temperature. In the general measurement state, press the STO/CAL key to display one by one with an unlock symbol. If you need to clear all records, press and hold the STO/CAL key for 2 seconds. h. EMS: The emissivity can be set between 0.1 and 1.0 with the ▲/▽ key, and press the SET key to confirm the setting 6. LCD display