Reliable, portable, and easy to use, the Kestrel 2000 Pocket Wind Meter measures air, water, and snow temperature, wind chill, current wind speed, average wind speed, and maximum wind gust. And with Kestrel's patented external sensors, you can take accurate temperature readings that aren't influenced by hand warmth. The patented 1” impeller is mounted on a sapphire jewel bearing that's easy to replace / recalibrate. The large LCD display is easy-to-read with a backlight and data hold function. Includes a neck lanyard with slip on protective covering and sure-grip over molding. Completely waterproof and buoyant (will not sink). Runs on a CR2032 coin cell battery with an average lifespan of 300 hours. Made in the USA with a 5-year warranty and 30-day money-back satisfaction guarantee.