Features:  Two laserlines for accurate target aiming to improve measurement accuracy.  Color LCD display design, you can see the measurement data of real time temperature and real time humidity clearly, easy to use even under poor illumination.  0.1-1.0 emissivity adjustable design, which can be adjusted according to different material.  Simple one-handed operation, suitable for almost all ages.  Support thermoelectric couple measurement function.  ℃ and ℉ temperature unit conversion design, you can adjust it easily according to your use habits.  With low battery indication, data holding, automatic shut off function.  Equipped with NCV voltage sensors function.    Specifications:  Name: Infrared Temperature Measurement Device  Material: plastics  Model: KM-K550HET  Power: 1 * 9V, 6F22 battery (not included)  Measurement ranges: -50℃ to 550℃/-58 ℉ to1022℉  Accuracy: ±2% or 2°C  Distance spot-ratio: 12:1  Emissivity: 0.1-1.0  Response time/wavelength: 500ms(8-14um)  Repeatability: ±1% or ± 1°C  Resolution: 0.1°C or 0.1°F  Storage temperature: -20°C to 50℃(-4-122℉)  Operating temperature: 0°C-50°C(32-122℉)  Max temperature measurement: Yes  ℃/℉ switch: Yes  Low battery indication: Yes  Laserline target display selection: Yes  Automatic data-hold: Yes  Auto power shut off: Yes  Item size: 174 * 142 * 32mm / 6.85 * 5.59 * 1.26in  Item weight: 220g / 7.76ounce  Package size: 200 * 160 * 50mm / 7.87 * 6.30 * 1.97in  Package weight: 347g / 12.24ounce    Packing List:  1 * Infrared Temperature Measurement Device  1 * Instruction Manual