The 2450BM15B0002 from Johanson Technology is a Balun with Frequency 2.4 to 2.5 GHz, Phase Balance 15 Degree, Insertion Loss 1.5 dB, Power 2 W, Return Loss 9.5 dB. Tags: Ceramic, Surface Mount, Unbalanced to Balanced. More details for 2450BM15B0002 can be seen below.