The Z7550-BFNF+ from Mini Circuits is a Balun with Frequency DC to 2.5 GHz, Insertion Loss 0.01 to 0.44 dB, Current 5000 mA, VSWR 50 omhs: 1.27:1 to 1.51:1, 75 ?: 1.07:1 to 1.46:1. Tags: Module with Connectors, Unbalanced to Unbalanced. More details for Z7550-BFNF+ can be seen below.