Klein Tools IR5 Dual Laser 12:1 Infrared Thermometer Optical Resolution (Distance-to-spot) is 12:1 Features include dual-laser targeting; auto-scan; max/min/avg/diff; high/low alarm; backlit display; auto power-off Drop protection to 6.6-feet (2 m) Measurement Range: -22-degrees to 752-degrees F (-30-degrees to 400-degrees C) Uses one 9-volt battery, with battery life expectancy at 10 hours of continuous use with laser and backlight on Includes custom pouch and batteries Adjustable emissivity Soft-touch, over-mold housing For ambient temperatures above freezing, the accuracy is +/- 4-degrees F or +/- 2-percent; Accuracy below freezing is +/- 4-degrees F plus 0.2 degrees per degree below 32-degrees F Certified to IEC EN 61326-1.2006, EN608251.1994+A2.2001+A1.2002