The RKT300G4A20 from RF-Lambda is a RF Variable Attenuator with Frequency 900 MHz to 4 GHz, Attenuation Range 20 dB, Power 300 W, Peak Power 63.01 dBm, Insertion Loss 0.5 to 1 dB. Tags: Module with Connectors, Rotary, Continuously Variable. More details for RKT300G4A20 can be seen below.