TELEWAVE's TPRD-4546 400 – 512 MHz pass-reject base station duplexer, 3 MHz minimum separation, six (6) 4 in cavities. This duplexer allows simultaneous operation of a transmitter or combiner and receiver into a common antenna. This bandpass and band reject duplexer provides maximum transmitter-to-receiver isolation with minimal insertion loss. *Factory tuned to