The Extech EA31-NIST EasyView Light Meter sports a compact and rugged design that features a large display. Multiple wide measuring ranges: 20,000Fc in 4 ranges and 20,000Lux in 4. Data hold freezes reading on display Min/Max readings. Zero function Cosine and color corrected measurements. Auto power off to save battery life. Meter utilizes precision silicon photo-diode sensor with 3ft coiled cable for easy storage. With NIST Calibration.