Milennia MA100PKGIncludes:AMP (MIL MA-100)Fully marinized circuit boards to keep salt and corrosion away from the critical circuit pathOnboard high low filterGreat for adding another pair of speakers.Small footprint45W, 20W RMSOverall Size: 4 L x 3-3/16 W x 19/16 HSpeaker (SEA 5582) Weatherproof 5 1-Piece SpeakerAll molded waterproof5 oz magnet75 Watt High Performance Speaker1 tweeterInstallation size: 4-A 1/2 W x 1 D x 4-A 1/2 HOverall size: 5-A 3/4 W x 2-A 1/2 D x 5-A 3/4 HMini Plug (Sea-mini)72 cordDimensions: 30 mm diameter, 24 mm deep