The AV-2040 from RLC Electronics is a RF Variable Attenuator with Frequency 2.0 to 4.0 GHz, Attenuation Range 23 dB, Power 5 W, P1dB 37 dBm, Insertion Loss 0.5 dB. Tags: Module with Connectors, Continuously Variable, Rotary. More details for AV-2040 can be seen below.