Features: Sensor wavelength range 320 to 390nm UV sensor with cosine correction measures irradiance from UV-AB light sources up to 40.00 mW/cm² Backlit LCD for easy viewing Zero function Data Hold freezes current reading on display Tripod mount (optional TR100 Tripod sold separately) Complete with two AAA batteries and a pouch Accessories: UM200-KTL - Set of 4-wire Cables with Kelvin Clip Connector Test Leads Specifications: Measuring Ranges: 1 to 3999 μW/cm² Dimensions: 5.2 x 1.9 x 1" (133 x 48 x 23mm) The Extech UV510 pocket-sized UV light meter measures UV-AB light from natural and artificial light sources used in outdoor activities and indoor medical testing, laboratory/research, industrial, education, electronics, and forensics/criminology applications. It offers a backlit display, cosine corrected sensor, two selectable ranges, zero function, display hold, and auto power off. Includes a pouch to protect and store your meter.