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 2C Distance spot-ratio: 12:1 Emissivity: 0.1-1.0 Response time/wavelength: 500ms(8-14um) Repeatability: 1% or 1C Resolution: 0.1C or 0.1F Storage temperature: -20C to 50(-4-122) Operating temperature: 0C-50C(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