The DP2549K0603BT from Frontier Electronics is a Diplexer with Frequency f1 2.4 to 2.5 GHz, Frequency f2 4.9 to 5.9 GHz, Attenuation 18 to 20 dB, Attenuation f1 18 to 20 dB, Attenuation f2 20 dB. Tags: Surface Mount. More details for DP2549K0603BT can be seen below.