... smart appearance, backlight, auto-shutdown and widely dynamic range, good testing precision and universal optical connector for FC/SC ... fiber sensorsSpecifications TypeBD503ABD503BWavelength(nm)800~1650DetectorInGaAsOptical ConnectorFC SC ST/ Universal 2.5mm adapter (LC,MU can be optional ... )Measurement Range(dBm)-70~+10-50~+26Uncertainty±5%Standard Wavelength(nm)850,1300,1310,1490,1550, ...