GVO Marine Electronics: We provide reliable, safe online shopping 24 hours a day, 7 days a week throughout the U.S. and the world. We are strongly committed to providing our customers with top quality merchandise and world class service. 63676 VLH-3000A 30W Dual Zone PA/Loud Hailer/Fog w/Listen Back 2 Optional Intercom Stations Features: 30W PA/Hailer output with Listen Back Dual Zone - Forward, Aft or Both 6 Preprogrammed Fog Signals: Underway, Stop, Sail, Tow, Anchor and Aground Horn and Siren Noise canceling microphone with dedicated CALL, IC1 and IC2 keys Compatible with MLS-300 and MLS-310 (10W amplified) external audio speakers Compatible with optional MLS-300i intercom speaker with Push-to Alert button for IC1 and IC2 Flush Mount capable with optional MMB-84 Adjustable Backlight 3 Year Waterproof Warranty Auto Signaling: Yes Hailer Wattage: 30w Intercom Capability: Yes Listen-Back: Yes GVO Marine Electronics: . Get the item you ordered or get your money back. Covers your purchase price and original shipping.