The T4-6T+ from Mini Circuits is a Balun with Frequency 0.02 to 250 MHz, Insertion Loss 0.26 to 2.30 dB, Current 30 mA, Power 0.25 W, Return Loss 3.08 to 23.39 dB. Tags: Surface Mount, Unbalanced to Balanced. More details for T4-6T+ can be seen below.