A pocket-size continuity tester for identifying and troubleshooting drop cable lines. The LED unit, used alone, reads shorts and splitters. This unit can be used to check integrity of new reels of cable before leaving the warehouse. The LED unit and Toner unit, used at each end of a line, identify clean cable lines, assist in isolating problems or identifying lines at MDU lock boxes. Small lightweight unit conveniently clips to a shirt pocket. 4 1/8” length. Battery and F81 barrel connector included. Wt. 3 ozs.