The TRS1.33-1T-75+ from Mini Circuits is a Balun with Frequency 1 to 400 MHz, Insertion Loss 0.37 to 0.68 dB, Current 300 mA, Power 0.75 W, Return Loss 20.37 to 33.93 dB. Tags: Surface Mount, Unbalanced to Balanced. More details for TRS1.33-1T-75+ can be seen below.