SkyRC #SK-500016/01 Skyrc Infrared Thermometer for most RC cars This is an infrared thermometer (IR) specifically designed for use with R/C engines, electronic speed controllers, motors, battery packs, battery chargers, etc. Simply aim the infrared thermometer at the target and press the measurement button to quickly and easily display the surface temperature! There are four methods to measure temperatures. Point the sensor located on the top end of the gauge directly at the object to be measured, and do one of the following: QUICK MODE: Press the "MEASURE" button once for an instantaneous temperature reading to be shown on-screen. SCAN MODE: Press and hold the "MEASURE" button to read temperatures continually. The temperature onscreen will be updated continually. MAX TEMP MODE: Press and hold the "MEASURE" button and the thermometer will display and lock the hottest or MAX temperature that is observed while the button is being held. MIN TEMP MODE: Press and hold the "MEASURE" button and the thermometer will display and lock the coolest or MIN temperature that is observed while the button is being held. High accuracy and high speed infrared sensor. Celsius and Fahrenheit scale selectable. Tests a wide range of temperature from -40F to 716F (-40C to 380C). The infrared emissivity coefficient can be adjusted. A large LCD displays temperature, emissivity coefficient and battery's capacity. Back lit screen makes it easy to operate and read. 1 minute auto-off timer to save battery's life