The 2450FB15K0008 from Johanson Technology is a Balun with Frequency 2.4 to 2.5 GHz, Phase Balance 10 Degree, Insertion Loss 3.5 dB, Power 1 W, Return Loss 9.5 dB. Tags: Ceramic, Surface Mount, Unbalanced to Balanced. More details for 2450FB15K0008 can be seen below.