The 2DZ25-1227/1575-50 from K&L Microwave is a Diplexer with Frequency f1 1197 to 1257, Frequency f2 1545 to 1605 MHz, Attenuation 30 dB, Attenuation f1 30 dB, Attenuation f2 30 dB. Tags: Module with Connectors, Ceramic. More details for 2DZ25-1227/1575-50 can be seen below.