Powered by laser sight technology, the Rosewill REGD-TN439L0 infrared thermometer can measure object temperature from -35 to 365ºC(-31 to 689ºF) at ambient temperature from 0 to 50ºC (32 to 122ºF) with +/- 1.5ºC(2.7ºF) accuracy and 0.2ºC(0.5ºF) step in just one second. Its large LCD screen with bright amber color backlit shows legible real-time temperature information. Featuring longer battery life and auto power off, this infrared thermometer lasts longer between charges. Versatile Thermometer with Large LCD ScreenThe Rosewill REGD-TN439L0 infrared thermometer is a great tool for detecting temperature of motherboard/video card, air condition outlet temperature and Auto engine temperature. With a large LCD screen, watch the temperature of objects in real time easily. Longer Battery LifeWith two AAA batteries, The Rosewill REGD-TN439L0 can works up to 18 hours which is longer than traditional 9V thermometer.