The ADTL1-4-75+ from Mini Circuits is a Balun with Frequency 0.5 MHz to 1 GHz, Insertion Loss 0.17 to 1.41 dB, Current 30 mA, Power 1 W, Return Loss 11.4 to 61.49 dB. Tags: Surface Mount, Balanced to Balanced. More details for ADTL1-4-75+ can be seen below.