The NCS2-771-75+ from Mini Circuits is a Balun with Frequency 240 to 770 MHz, Amplitude Balance ± 0.04 to 0.21 dB, Phase Balance 1.10 to 7.99 dB, Insertion Loss 0.58 to 0.79 dB, Power 3 W. Tags: Ceramic, Unbalanced to Balanced. More details for NCS2-771-75+ can be seen below.