Traceable to NIST for accuracy! to assure accuracy an individually serial-numbered traceable certified cate is provided from the Manufacturer's ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (National Institute of standards and technology). what's included: Type K beaded sensor and two AAA batteries, traceable certificate dual lasers indicate the outer diameter of the surface area being measured and the white LED light illuminates the surface IR range: -76 to 1022°f and -60 to 550°c resolution is 0.1°, accuracy is ±2 percent or 2°c + 2 percent adjustable emissivity may be set from 0.1 to 1.00 in increments of 0.01 field of view is 12:1 Type K range: -83 to 2552°f and -64 to 1400°c min/max, average, current temperature along with: emissivity value, maximum memory, minimum memory, differential, average (time weighted), high temperature alarm, low temperature alarm, and probe temperature, °F/°C audible, user settable, high and low alarms signal out of range conditions backlight display permits viewing in low light conditions size: 7 x 3.75 x 2"; weight: 9 oz