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SM 1310/1550nm HCW290 Smart Handy OTDR Otdr Machine HCW290 Smart Handy OTDR Functions: 1. OTDR: 1310/1550nm , 22/20dB, 0-60km 2. Optical Power Meter : -70~+10dbm or -50~+26dbm 3. Visual Fault Locator ...