The DA-100-3U-1300/1550-9/125-S-50 from OZ Optics Ltd. is a Fiber Optic Attenuator with Attenuation 1 - 60 dB, Attenuation Resolution 0.01 dB, Insertion Loss 1 dB, Operating Temperature -10 to 55 Degree C, Optical Power w Up to 2 W. More details for DA-100-3U-1300/1550-9/125-S-50 can be seen below.