The RKT1G4A11 from RF-Lambda is a RF Variable Attenuator with Frequency DC to 4 GHz, Attenuation Range 11 dB, Attenuation Step 1 dB, Attenuation Accuracy ±0.5 dB, Power 1 W. Tags: Module with Connectors, Rotary. More details for RKT1G4A11 can be seen below.