The TMO-4-2+ from Mini Circuits is a Balun with Frequency 0.2 to 600 MHz, Insertion Loss 0.55 to 2.35 dB, Current 30 mA, Power 0.25 W, Return Loss 1.35 to 24.29 dB. Tags: Plug In, Unbalanced to Unbalanced. More details for TMO-4-2+ can be seen below.