The AF052-30/75/BF from Narda-ATM is a RF Variable Attenuator with Frequency DC to 500 MHz, Attenuation Range 0 to 30 dB, Power 0.5 W, Insertion Loss 1 dB, Operating Temperature -24 to 70 Degree C. Tags: Module with Connectors, Continuously Variable, Rotary. More details for AF052-30/75/BF can be seen below.