The Fusion® Apollo™ RA670 marine stereo embodies award-winning audio innovation in a compact form factor. Featuring built-in Digital Signal Processing technology from Fusion, enjoy superior sound quality in every listening environment with custom audio profiles. Fusion PartyBus™-Network gives you the freedom of musical choice on board your boat, allowing you to group multiple networked stereos to play the same audio source in sync. When the Apollo RA670 is connected via Ethernet to an external wireless network router (sold separately), it gains Wi-Fi® capabilities including Wi-Fi audio streaming with Apple AirPlay® 2 and over-the-air software updates. The Apollo RA670 also has advanced source options and Multi-Zone™ technology in up to 3 independent audio zones for a customized listening experience. With Fusion-Link™ integration, control your audio from compatible multifunction displays, smart devices or Garmin watches. True-Marine™ accredited, the Apollo RA670 comes with a 3 year limited consumer warranty.