The AT-K000-30D from UMCC is a RF Variable Attenuator with Frequency 500 MHz to 4 GHz, Attenuation Range 30 dB, Attenuation Step 0.125 dB, Power 1 W, P1dB 30 dBm. Tags: Module with Connectors, Programmable, Digital, Computer Controlled. More details for AT-K000-30D can be seen below.