The 2109 from Narda-ATM is a Fixed Attenuator with Frequency DC to 40 GHz, Attenuation 3, 6, 10, 20, 30 dB, Power 2 W, Peak Power 250 W, Attenuation Accuracy ± 0.4dB Max @ 3-6dB to ± 0.8dB Max @ 30dB. Tags: Module with Connectors. More details for 2109 can be seen below.