The 4684-40X from ARRA Inc. is a RF Variable Attenuator with Frequency 3 to 4 GHz, Attenuation Range 40 dB, Power 10 W, Peak Power 66.99 dBm, Insertion Loss 0.5 dB. Tags: Module with Connectors, Rotary, Continuously Variable. More details for 4684-40X can be seen below.