The TC4-1WX+ from Mini Circuits is a Balun with Frequency 3 to 800 MHz, Insertion Loss 0.83 to 2.21 dB, Current 30 mA, Power 0.25 W, Return Loss 9.07 to 16.72 dB. Tags: Surface Mount, Unbalanced to Balanced. More details for TC4-1WX+ can be seen below.