Boss Audio 4-Channel Bluetooth Amplifier w/4 Speakers. 5" MR6W full range marine speakers a 10 foot universal USB cable and a phone pouch. Each pair of speakers has 180 Watts MAX 90 Watts RMS power handling. This package is compatible with audio out from smart phones and MP3 players. The amplifier features Bluetooth audio streaming aux low level inputs RCA Pre-Amp Outputs and a USB charging port. Includes a flush mount bezel for remote and a mounting bracket. Specifications for Boss Audio ASK904B.64 4-Channel Bluetooth Amplifier w/4 Speakers: Manufacturer: Boss Audio Color: Blue Features of Boss Audio ASK904B.64 4-Channel Bluetooth Amplifier w/4 Speakers Weatherproof MR6W 6.5" Full Range Marine Speakers with Poly Carbon Cone and Rubber Surround 180 Watts MAX 90 Watts RMS Power Handling per Pair MC900B has 500 Watt Max Power 4 Channel Weather Proof Amp with Multi-Function Remote Aux Low Level Inputs RCA Pre-amp Outputs and USB Charging Port Bluetooth Audio Streaming - play music and apps like Spotify/Pandora wirelessly NO Head unit is Needed to Play your Music Includes Flush Mount Bezel for Remote Mounting Bracket 10 ft. USB Cable and Protective Phone Pouch Audio Streaming Audio streaming A2DP is an audio protocol of Bluetooth technology. This profile allows for audio to be streamed wirelessly from your compatible device such as a Smartphone to the source unit so you can enjoy your favorite music or streaming music service such as Pandora or Spotify wirelessly. Aux Input The Aux Input allows you to connect to the audio output of an external device such as an MP3 Player or Smartphone so you can enjoy your music through your system. Fully Marinized Fully Marinized is the term we use for our Marine and Outdoor products that are Weather Proof. We integrate high-tech state-of-the-art waterproofing materials plus special UV coatings for plastic surfaces coated circuit boards and connections to protect the product against the harsh outdoor elements and resist corrosion. Multi-Function Remote Control In-line Remote Control that can be installed in a convenient safe place to allow you to control the volume track and other functions of your system while riding. USB Charging Built-in 1A charger allows you to charge your USB connected device thru this units USB port. Package Contents: Boss Audio ASK904B.64 4-Channel Bluetooth Amplifier w/4 Speakers Boss Audio ASK904B.64: 4-Channel Bluetooth Amplifier w/4 Speakers ASK904B.64