The CSI-DC20/700-2.7K/N from Westell Technologies is a Directional Coupler with Frequency 700 MHz to 2.7 GHz, Coupling 20 dB, Coupling Variation 1.2 dB, Directivity 18 dB, Power 100 W. Tags: Module with Connectors. More details for CSI-DC20/700-2.7K/N can be seen below.