The TCM4-1W+ from Mini Circuits is a Balun with Frequency 3 to 800 MHz, Insertion Loss 0.93 to 2.29 dB, Current 30 mA, Power 0.25 W, Return Loss 9.01 to 22.08 dB. Tags: Surface Mount, Unbalanced to Balanced. More details for TCM4-1W+ can be seen below.