Standard Horizon 30w Dual Zone Loud Hailer w/ Optional Intercom Stations Brand New Includes Three Year Limited Warranty The Standard Horizon VLH-3000A is a 30w Dual Zone PA/Loud Hailer/Fog w/Listen Back and comes with 2 Optional Intercom Stations. It features connections for forward and after PA horns with listen-back and includes bells and whistles for four fog signals. It has a large back-lit keypad and over-sized knobs which provides easy operation even while wearing gloves. The VLH-3000A can be flush Mounted with optional MMB-84. It is capable of connecting upto 2 optional MLS-300i speakers using Push to Alert button with Dual-station intercom. When pushed, it produces an alert to the station being called. It also features manufacturer-rated waterproof to IPX7 and can be submersible to 3' for 30 minutes. VLH-3000A Features Loud Hailers Part Number VLH-3000A Flush Mount Capable Lightweight Compact 30w PA/Hailer Output 6 Preprogrammed Fog Signals Underway, Stop, Sail, Tow, Anchor Aground Horn and Siren 3 Multi function Modes Hail/Listen Back Intercom Mode Automatic Signaling Noise Canceling Microphone Adjustable Backlight Waterproof Integrity Performance IPX7 Compatible With MLS-300 And MLS-310 Z External Audio Speakers