The FTB-1-1+ from Mini Circuits is a Balun with Frequency 0.2 to 500 MHz, Insertion Loss 0.58 to 2.53 dB, Current 30 mA, Power 0.25 W, Return Loss 6.59 to 23.84 dB. Tags: Module with Connectors, Unbalanced to Balanced. More details for FTB-1-1+ can be seen below.