The GZL-2.4 from Shanghai Huaxiang Computer Communication Engineering is a DC Block with Frequency 10 MHz to 50 GHz, Insertion Loss 1 dB, Breakdown Voltage 50 V (DC Voltage), VSWR 1.45:1, Operating Temperature -55 to 85 Degree C. Tags: Connectorized. More details for GZL-2.4 can be seen below.