The TCN2-45+ from Mini Circuits is a Balun with Frequency 3.3 to 4.5 GHz, Amplitude Balance ± 0 to 1.15 dB, Phase Balance 0.48 to 7.07 Degree, Insertion Loss 0.70 to 1.22 dB, Power 5 W. Tags: Ceramic, Balanced to Balanced. More details for TCN2-45+ can be seen below.