The TX-2-5-1+ from Mini Circuits is a Balun with Frequency 20 to 1250 MHz, Insertion Loss 1.24 to 1.68 dB, Current 30 mA, Power 0.25 W, Return Loss 17.94 to 25.31 dB. Tags: Surface Mount, Unbalanced to Balanced. More details for TX-2-5-1+ can be seen below.