The AT-A000-HV from UMCC is a RF Variable Attenuator with Frequency 250 to 500 MHz, Attenuation Range 0 to 60 dB, Power 1 W, P1dB 20 dBm, Insertion Loss 1.9 dB. Tags: Module with Connectors, Voltage Controlled. More details for AT-A000-HV can be seen below.