The T1-1T-KK81+ from Mini Circuits is a Balun with Frequency 0.08 to 200 MHz, Insertion Loss 0.36 to 2.78 dB, Current 30 mA, Power 0.25 W, Return Loss 1.64 to 19.67 dB. Tags: Surface Mount, Unbalanced to Balanced. More details for T1-1T-KK81+ can be seen below.