The CP30008A-20 from Amtery is a Dual Directional Coupler with Coupling 19 to 21 dB, Coupling Variation ±0.7 to 1 dB, Frequency 0.5 to 8 GHz, Average Power 20 W, Insertion Loss 1.2 to 1.4 dB. Tags: Module with Connectors. More details for CP30008A-20 can be seen below.