Features: This non-contact thermometer can simply measure temperature by pointing to an object.Designed with a laser pointer that helps to aim accurately.It has laser switch, 20 seconds automatic power off and temperature data storage function.The temperature unit is switchable between Celsius and Fahrenheit.Light weight and compact structure, simple single hand operation.Widely used for temperature measuring of hot water pipes, engine parts, cooking surface, heat insulation, motor, swimming pools, fish tank, hot and cold food, heating system, air conditioning, etc. Specifications:Model: GM550 Temperature Range: -50~550 (-58~1022)Accuracy: 1.5% or 1.5Resolution: 0.1 or 0.1Repeatability: 1% of reading or 1Response Time: 500mSec, 95% responseSpectral Response: 8 - 14umEmission Rate: 0.95 presetDSR: 12:1Operating Temperature: 0~40 (32~104)Environmental Humidity: 10%~95% r.h.Storage Temperature: -20~60 (4~140)Power Supply: 1pc x 9V zinc-manganese battery (NOT included)Size: 15.5*10cm/6.1*3.9inWeight: 208g(approx.) Package Includes:1 x Thermometer (battery is NOT included)1 x English User Manual .