The MDC010400R31B6 from Meuro Microwave is a RF Variable Attenuator with Frequency 1 to 40 GHz, Attenuation Range 31.5 dB, Insertion Loss 12.3 dB, Supply Voltage -5 to 5 V, Current 50 mA. Tags: Module with Connectors, Drop In, Digital. More details for MDC010400R31B6 can be seen below.