The 4-5804-10 from ARRA Inc. is a RF Variable Attenuator with Frequency 3.6 to 4.3 GHz, Attenuation Range 10 dB, Power 5 W, Peak Power 64.77 dBm, Insertion Loss 0.5 dB. Tags: Module with Connectors, Rotary, Continuously Variable. More details for 4-5804-10 can be seen below.