Safely measure temperatures from -40°C up to 650°C in hard to reach places, and hot or hazardous areas. The circular laser targeting from the two built-in lasers and 16:1 distance to spot ratio provides more accurate and repeatable measurements. The rugged design with IP54 rating offers protection against dust and water. Features include min, max, average, difference temperature displays, data hold, and high and low alarms with backlight. It has a large white backlit LCD, a rapid response time of less than 150ms, and a digitally adjustable emissivity from 0.1 to 1.0, which helps improve accuracy depending on the materials you are measuring. Supplied in a carry case. Please note this unit only measures surface temperature not internal body temperatures. -40 to 650°C Rapid detection function Built-in dual laser pointer 16:1 Distance to spot ratio Automatic data hold Max/min function Emissivity Digitally adjustable from 0.10 to 1.0 MAX, MIN, AVG, DIF temperature displays High and Low alarms with red backlight Class 2 laser product Repeatability: ± 0.8% or ±2°F(1°C) (used the max reading) Response Time: Less than 150ms Spectral Response: 8~14um Over Range Indication: LCD will show “----” Polarity: Automatic (no indication for positive polarity); Minus (-) sign for negative polarity -40 ~ 0°C: (± 2°C + 0.2°C Per degree) 0~650°C: ± (1.5°C) OR ± 1.5%