The CER0686A from CTS Electronic Components is a RF Duplexer with Frequency 698 to 746 MHz, Band 1 728 to 746 MHz, Band 2 698 to 716 MHz, Power 3 W, Insertion Loss 3.5 to 3.8 dB. Tags: Ceramic, Surface Mount. More details for CER0686A can be seen below.