The MW9070A is the first mini-OTDR with a modular design and performance of a bench top. The user can change optical units in the field eliminating the need to return the unit to the factory for upgrades MW 9070A Mini-OTDR . Single Button Testing Automatically measures and reports splice and fault locations Optimal setup parameters are automatically selected Waveform and event table displayed simultaneously 3.5" floppy disk drive option and SRAM card store/recall fiber characterizations Large 7", well organized, menu driven backlit display Weighs only 7 lbs