The Fiber OWL 4 BOLT is a high accuracy, high resolution, microprocessor controlled optical power meter. It has an attractive handheld case made from high impact plastic, a large, backlit, graphic, liquid crystal display, and 18-key keypad for easy data entry. The universal port accepts 2.5mm connectors, such as ST, SC, and FC, and also comes with a 1.25mm universal port, which can accept LC, MU, and other SFF connectors. It will operate for over 100 hours on a standard alkaline 9v battery and has built-in auto shutdown. A length testing port is included for end-to-end fiber optic link length measurements.