The C4-03-411 from Pulsar Microwave is a Directional Coupler with Frequency 0.5 to 100 MHz, Coupling 20 dB, Coupling Variation ±0.5 dB, Amplitude Flatness 0.25 dB, Directivity 25 dB. Tags: Module with Connectors. More details for C4-03-411 can be seen below.