SANTEC OTF-930 Polarisation Independent 80 nm Optical Tunable Filter 1530-1610nmCondition: Used Note we have multiple units so cosmetically they may differ a little. Please note the key barrel has been removed and so it powers on with the button. From the manufacturer: Santec OTF 930 Tuning range 1530 1610 nm Specifications Tuning range: 1530 1610 nm Wavelength resolution: 0. 01 nm Wavelength accuracy: < 0. 2 nm Wavelength repeatability: < 0. 1 nm Input power: < +20 dBm Return loss: > 45 dB PMD: < 0. 1 ps PDL (SMF): < 0. 2 dB