1. Measuring range: -50 degrees Celsius to 800 degrees Celsius (-58 degrees Fahrenheit to 1472 degrees Fahrenheit)2. Distance ratio: 12:13. Emissivity: 0.95 preset4. This infrared thermometer is used to measure the temperature of the surface of an object, suitable for a variety of high-temperature, dangerous or difficult-to-reach objects, without contact5. This unit consists of optical components, temperature sensor signal amplifier, processing circuit and LCD display. The optical device collects the infrared energy emitted by the object and focuses it on the sensor. The sensor then converts the energy into an electrical signal. The signal is digitally displayed on the LCD display after the signal amplification processing circuit6. 1.5V AAAx2 batteries (not included)Specification: Package Weight One Package Weight 0.22kgs / 0.49lb One Package Size 21cm * 15cm * 6cm / 8.27inch * 5.91inch * 2.36inch Qty per Carton 40 Carton Weight 9.80kgs / 21.61lb Carton Size 62cm * 44cm * 32cm / 24.41inch * 17.32inch * 12.6inch Loading Container 20GP: 305 cartons * 40 pcs = 12200 pcs 40HQ: 709 cartons * 40 pcs = 28360 pcs