Advanced Optical Fiber Identifier w/ Power Meter & VFL, 1 mm Dia. InGaAs Detector; Built-in Power Meter; Built-in Visual Fault Locator; Identifies the Traffic Direction and Frequency (270 Hz, 1 kHz, 2 kHz) with an Audible Warning; Reversible Adapter has One Side for 2 mm and 3 mm Fiber Optic Cables and the Opposite Side is used for 250 mm and 900 mm Fiber (NEW) still in box