The FTB-1-1-75+ from Mini Circuits is a Balun with Frequency 0.5 to 500 MHz, Insertion Loss 0.57 to 2.12 dB, Current 30 mA, Power 0.25 W, Return Loss 9.11 to 18.35 dB. Tags: Module with Connectors, Unbalanced to Balanced. More details for FTB-1-1-75+ can be seen below.