The ARS-1 from Crane Aerospace & Electronics is a RF Variable Attenuator with Frequency DC to 400 MHz, Attenuation Range 0 to 20 dB, Power 0.5 W, Insertion Loss 1 to 2.5 dB, Operating Temperature -55 to 85 Degree C. Tags: Plug In, Continuously Variable. More details for ARS-1 can be seen below.