The C-1530 from RLC Electronics is a Directional Coupler with Frequency 1.50 to 3 GHz, Coupling 6 to 30 dB, Coupling Variation ±0.5 to 1 dB, Directivity 20 dB, Average Power 50 W. Tags: Module with Connectors. More details for C-1530 can be seen below.