The 311-3G-25 from Innowave RF is a Fixed Attenuator with Frequency DC to 3 GHz, Attenuation 6, 10, 15, 20, 30 dB, Power 25 W, Attenuation Accuracy ±0.5, 0.7, 0.8, 1 dB, Operating Temperature -30 to 80 Degree C. Tags: Module with Connectors. More details for 311-3G-25 can be seen below.