The T5-1T-KK81+ from Mini Circuits is a Balun with Frequency 0.3 to 300 MHz, Insertion Loss 0.76 to 1.91 dB, Current 30 mA, Power 0.25 W, Return Loss 6.84 to 19.50 dB. Tags: Surface Mount, Unbalanced to Balanced. More details for T5-1T-KK81+ can be seen below.