The T2-1-KK81+ from Mini Circuits is a Balun with Frequency 0.050 to 600 MHz, Insertion Loss 0.18 to 1.83 dB, Current 30 mA, Power 0.25 W, Return Loss 4.07 to 23.90 dB. Tags: Surface Mount, Unbalanced to Unbalanced. More details for T2-1-KK81+ can be seen below.