The NCS1-422+ from Mini Circuits is a Balun with Frequency 3.3 to 4 GHz, Amplitude Balance ± 0.01 to 0.47 dB, Phase Balance 0.38 to 3.01 Degree, Insertion Loss 0.01 to 0.47 dB, Power 3 W. Tags: Ceramic, Unbalanced to Balanced. More details for NCS1-422+ can be seen below.