UT691 series visual fault locator is designed for optical ?ber fault detection and locating, end to end optical ?ber identi?cation and more. It is IP54 rated, uses 650nm visible redlight with 2 emitting modes. With the functions of APO, battery statusindicator and ?ashlight, it can be widely used in the ?elds of optical cable construction and maintenance, optical ?ber communication or sensing, and optical CATV.