The FX2300NF from Sinclair Technologies is a Cross Band Couplers with Frequency 138 to 512 MHz, Frequency Band1 138 to 174 MHz, Frequency Band2 380 to 512 MHz, Insertion Loss Band1 0.4 dB, Insertion Loss Band2 0.4 dB. Tags: Module with Connector. More details for FX2300NF can be seen below.