The CS06-018-388 from Westell Technologies is a Cross Band Couplers with Frequency 698 to 2300 MHz, Frequency Band1 698 to 900 MHz, Frequency Band2 1710 to 2300 MHz, Insertion Loss Band1 0.3 dB, Insertion Loss Band2 0.3 dB. Tags: Module with Connector. More details for CS06-018-388 can be seen below.