InGaAs Detector, -60 to 3 dBm Measurement Range, +/- 5% Accuracy, 0.01 dB Display Resolution, (3) AAA Alkaline Battery, 360 hr Operating Time, -25 to 70 deg C Storage Temperature, -10 to 60 deg C Operating Temperature, -6 to -7 dBm Typical Output Power, 0.