The WTA 500-750 | 4700069 from Radiometer Physics GmbH is a Waveguide Attenuator with Frequency 500 to 750 GHz, Average Power 0.1 W, Attenuation 0 to 40 dB, Insertion Loss 1.25 dB. Tags: Calibrated Attenuator. More details for WTA 500-750 | 4700069 can be seen below.