Features: 1SET ALARM THRESHOLD: Thermometer can be set to an alarm threshold value. When the measurement is higher or lower than the set threshold value, there will be a beeping alarm prompt sound, as well as alarm prompt light flashing. 2ACCURATE MEASUREMENT: Infrared thermometer is designed for high accuracy and accurate measurement over a temperature range of ? 50 to 880C (? 58 to 1616F) with an accuracy of 0.5C or 1% of the reading. 3FOUR DIGIT DISPLAY: Digital infrared thermometer provides accurate readings on a variety of surfaces and conditions. Supports four digit display up to 8888. Compact and portable for easier use. 4OPTICAL INDICATORS: Infrared thermometer optical indicators, as the distance to the measured target (D) increases, the area of the light spot measured by the thermometer area becomes larger. 5EMISSIVITY: In order to compensate for the measurement error caused by different emissivity, it is necessary to adjust the pyrometer emissivity value according to the material of the object to be measured. Package included: 1 x Infrared&nbspThermometer 1 x Lanyard 1 x Cloth Bag 1 x Instruction Book