Tranceiver Duplexer, Model # DB-4076W-A. 4 Cavity Pass/Reject Duplexer. Frequency Separation is 3 MHz or More. TX 1.2 db. RX 1.2 db. TX 463.550 MHz. RX 468.550 MHz. Let me know if you would like me to Tune to Your Frequency Pair for FREE &####128513;&####128076;&####127482;&####127480;&####128077.