The Blueant M1 Bluetooth Stereo Speakers provide crystal clear high quality audio delivered at 28 Watt RMS, making it one of the most powerful portable Bluetooth speakers in the world. And with an internal subwoofer and rechargeable battery, the M1 provides you with thumping tunes on the go for up to 10 hours. With a host of connectivity options, the Blueant M1 Bluetooth Stereo Speakers can play stereo music files via Bluetooth A2DP profile from a cell phone or Bluetooth-enabled MP3 player (such as the Apple iPhone) as well as from a Bluetooth-enabled PC or Mac.