The ANO 21-1003-04 from ANOISON Electronics LLC is a Fixed Attenuator with Frequency DC to 18 GHz, Attenuation 4 dB, Power 10 W, Peak Power 200 W, Attenuation Accuracy +/- 0.7 dB. Tags: Module with Connectors. More details for ANO 21-1003-04 can be seen below.