OWL MO-2 Micro OWL 2 Optical Power Meter has a 75dB dynamic measurement range as well as a accuracy of 0.15dB. The backlit LCD display shows accurate readings in dBm, dB, and microwatts. The OWL MO 2 Micro OWL 2 Optical Power Meter also features a built-in Loss Wizard that certifies fiber links against a plethora of national and international cabling standards.