The 3042B-20 from Narda-MITEQ is a Directional Coupler with Frequency 920 MHz to 2.2 GHz, Coupling 20 dB, Coupling Variation ±0.5 dB, Frequency Sensitivity ±0.25 dB, Directivity 20 dB. Tags: Module with Connectors. More details for 3042B-20 can be seen below.