The new DR-500 series from Advanced Fiber Solutions is a handheld full color display Optical Time Domain Reflectometer. The unit is one of the most compact OTDR’s on the market today, ideal for handheld use and pocket transportation. The unit is light weight weighing less than 1.6 Lbs. It is extremely rugged with a thick protective rubber boot surrounding the outer case. It also offers a long battery life enabling the technician to continuing test up to eight hours.