The 2450BM15A0001 from Johanson Technology is a Balun with Frequency 2.4 to 2.5 GHz, Phase Balance 15 Degree, Insertion Loss 1.0 dB, Return Loss 10 dB. Tags: Ceramic, Surface Mount, Unbalanced to Balanced. More details for 2450BM15A0001 can be seen below.