ODM OTR 500-S Singlemode OTDR w/ Bluetooth Connect to Android OS 1310/1550nm The OTR 500 OTDR is available with an Auto-Wavelength Switching Power Meter. The power meter is  calibrated at 850,1300,1310,1490,1550 and 1625nm, with storage of up to 10,000 power meter tests.  The OpTrace OTDR software incorporates a feature to supply loss measurement reports and a real-time  graph. Features: Event table with PASS/FAIL analysis Bi-directional averaging - unit automatically performs all necessary calculations Short event dead zones make both units ideal for short link installations Bluetooth compatibility for precision control with Android Bluetooth-enabled smartphones and tablets