The T1-1-KK81+ from Mini Circuits is a Balun with Frequency 0.15 to 400 MHz, Insertion Loss 0.64 to 2.75 dB, Current 30 mA, Power 0.25 W, Return Loss 1.98 to 20.06 dB. Tags: Surface Mount, Balanced to Balanced. More details for T1-1-KK81+ can be seen below.