The Navilution Listen EVERYWHERE Portable 4-CH AC/DC System is a GPS triggered commentary system with 4 channels for simultaneous delivery of audio to passenger's smartphones in different languages and topics. The system can be expanded to 16 channels with additional hardware. Simple and safe, this system allows passengers to use their own iOS or Android smartphone to select a channel and adjust volume. After passengers download the free app, there is no internet required. And, the app can be customized to your brand. It comes in a portable case that makes it simple and fast to set up in a vehicle or vessel. It can be operated on 110/220VAC or 12/24VDC. The system includes a display control panel and external GPS antenna/receiver for reliable GPS triggering. Route planning, GPS triggers and tour development is simple and easy using Navilution Cortex, a proprietary cloud-based software tool. For audio tour development, there is basic, advanced and creative tour development training and Listen tour development partners that can help in the development of your audio tour. The system also supports video delivery to an onboard monitor to enhance passenger experience and can be used for ASL.