Viavi JDSU OLT-55 Optical Loss Test Set 1310/1550 nm 2286/01 -70 to +20 dBm GE.Condition: Used In working condition, refer to images for cosmetic condition. Power adapter or batteries not included. From the manufacturer: Singlemode 1310 1550 nm 70 to +20 dBm Germanium Diode Auto zeroing function provides outstanding accuracy even high loss measurements with no manual zeroing necessary. Auto lambda function with TWINtest and TRIPLEtest provides automatic wavelength detection to speed up testing. Up to three different wavelengths