MRD80i is one of the MRD80 series. MRD80i is the DMD(Digital Music Device) Dock version. MRD80i is an AM/FM/Sirius Satellite Ready stereo/No Disc Player but with internal docking station for your digital music devices (DMD) like iPod®, MP3 or Smartphone devices. Insert your digital music devices and play your music. MRD80i is a full-featured waterproof marine stereo, waterproof designed, engineered and optimized for marine use. Designed specifically for the marine environment. With adjustable backlight display type with flip down face design. SD Card Reader available at the front, USB Input available to play your music from a USB Flash drive. Additional AUX Input available at the back.. Wired and Wireless Remotes available (sold separately). Gimbal mount option that allows the unit to mount anywhere from top to bottom.