I wish you have a pleasant shopping experience.GM550 Thermometer LCD Display Digital IR Infrared Non-Contact Laser GunGM550 Non-Contact IR Infrared Digital Temperature Temp Meter -58 oF ~ 1022 oFno-contact GM550 Infrared IR Thermometer Laser Gun LCD -50~550C Portable 12:1Product Description: Precise non-contact IR thermometer、 safe and easy to use. sight allows accurate targeting.Simply point to an object and read its temperature.Consist of optics、 temperature sensor、 signal amplifier、 processing circuit and LCD display.on/off switch、 Auto power off & temperature data hold. 20 seconds auto power off.Celsius and Fahrenheit switchable. Lightweight and compact.Suitable for: hot water pipes、 hot engine parts、 cooking surfaces、 hot tubes insulation、 electrical connection、 ballasts in electric lights、 electric motors、 bearings、 wine coolers hot asphalt、 swimming pools、 fish tanks、 hot & cold food products、 heating air conditioning、 etc.Specifications:Temperature range: -50 to 550¡æ (-58 to 1022F)Accuracy: ¡À1.5% or ¡À1.5¡æResolution: 0.1¡æ or 0.1FRepeatability: 1% of reading or 1¡æResponse time: 500mSec、 95% responseSpectral response: 8-14 umEmissivity: 0.95 presetDistance to spot size: 12 : 1Operating temperature: 0 ~ 40¡æ (32 ~ 104F)Operating humidity: 10 ~ 95 % R.H. Storage temperature: -20 ~ 60¡æ (-4 ~ 140F)Power supply: 9V Alkaline or NiCd BatteryDimensions: Approx. 155 * 100 * 45mmPackage size: 212 * 157 * 47mmPackage including:1 * Infrared Thermometer1 * User ManualIt's my pleasure to serve you.