8 Wireless Speakers For Your iPhone 4S
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Tablets are great for playing music while you browse the Web, play games, or chat with friends, but you usually need to choose between plugging in your headphones or locking your iPad into a dock. It's still handy, but not as handy as taking your new iPad, pressing a button on the screen, and filling the room with sound. Fortunately, wireless technology has some useful options that let you do just that, thanks to the magic of Apple's AirPlay technology and Bluetooth A2DP.
AirPlay is Apple's wireless audio feature that lets iPad, iPhone, and Mac users stream their iTunes libraries to any AirPlay-enabled speaker. It can simultaneously stream music to multiple speakers, and sends information about the track to any display on the speaker. It's a feature-rich wireless audio system for any iOS device or Mac user, but it only works with Apple products as players. You can't, say, stream music to an AirPlay speaker from your Android tablet. AirPlay speakers also tend to be more expensive than Bluetooth speakers, and most are significantly bulkier and power-hungry, meaning you're less likely to find a battery-powered one you can pick up and carry from room to room while listening.
Source: PC Magazine