The TT25-1-X65+ from Mini Circuits is a Balun with Frequency 0.02 to 30 MHz, Insertion Loss 0.27 to 2.72 dB, Current 30 mA, Power 0.25 W, Return Loss 2 to 28.34 dB. Tags: Plug In, Unbalanced to Balanced. More details for TT25-1-X65+ can be seen below.