The 50P-1978 from JFW Industries is a RF Variable Attenuator with Frequency DC to 2.7 GHz, Attenuation Range 63 dB, Attenuation Step 1 dB, Power 2 W, Insertion Loss 1.0 to 4.0 dB. Tags: Module with Connectors, Programmable, Digital, Computer Controlled. More details for 50P-1978 can be seen below.