RIFOCS Model 588RL (1310/1550 nm) Return-Loss Test Meter is developed for accurate measuring of return loss at fiber connectors and optical devices with a range of 0-70 dB. RS-232 interface and parallel printer port are available at the back panel. With the RIFOCS Model 575L power meter, the unit serves as a complete insertion loss and return-loss test station. Key Features Operation Wavelength 1310 and 1550nm Low insertion Loss and Return Loss Test Set Resolution 0.05dB Dynamic range 0-70dB. RS-232 interface and parallel printer port Compact size and Light Weight