The Agilent N3970A is a handheld Optical Power Meter operating from 850 to 1650 nm. It measures power from +5 to -70 dBm and features an interchangeable optical adapter to rapidly facilitate interconnection to a variety of optical connector types. The Agilent N3970A is a high-end, user-friendly, wide dynamic range device featuring three percent overall accuracy, quick response time and no need for a warm-up period. Unused.