The ZDB2B-4-YA from ZTS Technologies is a DC Block with Frequency 10 MHz to 4 GHz, Insertion Loss 0.30 dB, Breakdown Voltage 50 to 250 V, Input Power (Avg) 2 Watts, VSWR 1.20:1. Tags: Connectorized, Inner DC Block. More details for ZDB2B-4-YA can be seen below.