Bluetooth: Play and control music through your smartphone or MP3 player as well as apps like Spotify, wirelessly. Waterproof & Weatherproof – The GR307 waterproof marine bluetooth stereo receiver has been outfitted with IP66 Water Resistant, the latest weatherproofing techniques such as front panel UV coating, PC board with conformal coating. Big Power: This Boat Marine Radio built-in 4 X 72 Watt peak high powered amplifier (284RMS). Master piece heat dissipation: Big Heat Sink to Drive Max 4 x 6.5 Speakers, No Worries for Over-Heating. The GR307 does not have a CD or DVD mechanism. All our products are brand new and sealed. We take our reputation seriously.