The TC4-11+ from Mini Circuits is a Balun with Frequency 2 MHz to 1.1 GHz, Insertion Loss 0.36 to 1.10 dB, Current 30 mA, Power 0.25 W, Return Loss 18.37 to 40.18 dB. Tags: Surface Mount, Unbalanced to Unbalanced. More details for TC4-11+ can be seen below.