The NCS2-392+ from Mini Circuits is a Balun with Frequency 3 to 3.9 GHz, Amplitude Balance ± 0.06 to 0.78 dB, Phase Balance 0.02 to 4.81 Degree, Insertion Loss 0.20 dB, Power 3 W. Tags: Ceramic, Unbalanced to Balanced. More details for NCS2-392+ can be seen below.