his is SkyRC 380P Infrared Thermometer. Now you can take temperature measurement at a safe distance with SkyRC ITP380. RC hobbyists will never get burned or air blowing in your face from the RC vehicles, engines, motors, chargers, etc., while taking measurements. You can trust SkyRC ITP380 to get accurate temperature readings from a safe distance, wherever indoor or outdoor. SkyRC has engineered the ITP380 temperature measuring with accuracy down to the 0.1 °F and the object temperatures ranging from -40°F (-40°C) to 716°F (380°C). Compared to its predecessor, SkyRC deploys a classic TO-46 housing thermopile sensor. The thermopile sensing element, composed of 116 elements of small thermocouples with an active area of diameter 545 ?m on a silicon chip, absorb the energy and produce an output signal. It provides nearly Johnson-noise-limited performance, which can be calculated by its ohmic series resistance. Every infrared thermometer has a ""distance-to-spot"" (D:S) ratio that tells you the diameter of the area being measured compared to the distance from the target. The 380P thermometer has a distance-to-spot ratio of 6:1. That means it measures an approximately one-inch-diameter spot when it's 6 inches from the target (about 2.5 cm at 30 cm). It means ITP380 thermometer can accurately measure targets at greater distances compared to many other thermometers; Distance-to-spot ratio is crucial to measuring! So be sure to measure at this D:S ratio. NIST traceable calibration certifies that the lab or manufacturer in question is equipped and able to calibrate equipment to National Institute of Standards and Technology (NIST) standards and that products by that manufacturer match NIST-maintained measurement standards. With NIST traceable calibration, any measurements taken with a certified instrument have an unbroken chain of measurement leading back to NIST-maintained standards with known and documented uncertainties for each step in the chain and a quality assurance program in place to address them. We not only ship products, but we're also delivering trust! Feature: For: Miscellaneous Material: Plastic Color: Black ?m Accuracy Distance-to-Spot Ratio 6:1 Quick and Accurate Readings Easily Selectable Between Fahrenheit and Celsius Low-battery Indication Auto-power Off Compact Design Impressive Stunning VA Display Data at a Glimpse Versatile for The Hobby, Craft and Household Multiple Emissivity Coefficients NIST Traceable Calibration Beep Signals for Every Operation And Can Be Silenced Specification: Dimension: 121x40x39.6mm Weight: 75g Operation Voltage: AAA battery X 2 Operation Current: ?40ma@3.0V Operation Temperature: 0-50? Current Drain: ?25ua@3V Precision: -40?-0? +/-1.5?, 0?-380? +/-1.5?, -40??32? / ±3?, 32??716? / ±3? Adjustable Range for Infrared Emission Frequency: 0.01-1 (SK-500037)