The TRS2-252+ from Mini Circuits is a Balun with Frequency 4 to 2500 MHz, Insertion Loss 0.98 to 1.71 dB, Current 30 mA, Power 0.35 W, Return Loss 17.37 to 26.76 dB. Tags: Surface Mount, Unbalanced to Unbalanced. More details for TRS2-252+ can be seen below.