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An Internet radio device is a hardware device that receives and plays audio from Internet radio stations or a user's PC. The devices which are currently on the market mainly support MP3 (also known as MPEG3) streaming. Other popular formats like Windows Media Audio (WMA), RealAudio, Ogg, and Apple's AAC are supported by only a few of these devices.

Internet radio devices can be divided into several product categories:

• Products which are mainly targeted at listening to music stored on a local network. These devices are usually called network music players. These devices are usually sold with server software in order to play the music from the network. Examples of such devices are the Slim Devices Squeezebox2, Roku Soundbridge and the Philips Streamium WACS700 and SLA5520. Some of these devices also have the ability to listen to Internet radio stations. As these devices may not have an integrated loudspeaker, they need to be connected to an audio system in order to listen to the music. These devices usually have an Ethernet and/or Wi-Fi network interface.

• Standalone products like the Squeezebox, Reciva or Streamit Internet radio devices which are targeted at users who do not want to be dependent on a PC (or PC knowledge) for their internet radio listening. These products are often used in closed user group applications due to the ease with which a cut-down specialised stations list can be delivered to them. Closed user groups might be a geographically distributed ethnic community who all want to listen to the same internet radio station, or a commercial application such as restaurant chain that wants to distribute the same audio to all their restaurants. With several of these products, such as the Streamit and Reciva based radios, a dynamically updated stations list also makes it possible for the receiver always to have an up-to-date list of available on-demand content as it becomes available from national broadcasters BBC and VPRO. Some of these devices also allow the user to listen to media files from the local network, as with the network music players above. There are variants of these devices with and without an integrated speaker. They normally connect to the Internet via the user's broadband connection using an integrated Ethernet and/or Wi-Fi network interface.

• Standalone products like the Barix and Streamit Lukas EV. These products are targeted at professional audio streaming applications.

• Standalone wireless internet radio players like Sonowave, you can take your Internet Radio with you anywhere around your home or apartment. Although wireless network adapters could be added to any of the non-wireless receivers as can A/C power-line network extenders. A combination software/hardware control system allows you to change from Internet Radio, local FM, mp3 files, or CDs from your computer and from the tuner's location you can tune to local FM without having to go back to your computer.

Major brands:

• Association for the Advancement of Women in Web Development; AAWWD offers ON-DEMAND Table(http://www.aawwd.com/InternetRadioProducts.html)
• Barix (http://www.barix.com) Several IP audio streaming products.
• Logitech (http://www.slimdevices.com) Squeezebox v3 and Transporter digital music players.
• Roku (http://www.rokulabs.com) Roku SoundBridge network music player.
• Streamit (http://www.streamit.eu) Broadband and dial-up receivers, encoders and point-to-point VPN appliances.
• Reciva (http://www.reciva.com) Internet radio modules.
• Acoustic Energy (http://www.acoustic-energy.co.uk/) Standalone Wi-Fi Internet radio product based on Reciva technology.
• Magicbox Imp (http://www.theimpradio.com/) Another standalone Wi-Fi radio with Reciva technology.
• IMP Adaptor (http://www.theimpradio.com/) Remote controlled Wifi radio to be connected to a sound system.
• Bush Industries TR2015WIFI (http://www.albaplc.com/) Wi-Fi internet radio based on Reciva technology.
• Logik IR100 (http://www.dixons.co.uk/) Wi-Fi internet radio based on Reciva technology.
• Scitec IR-001W (http://www.scitec.jp/) Wi-Fi Reciva Internet Radio.
• PenguinRadio (http://www.penguinradio.com/penguin.html) Solutions WebRadio stand alone radio device (not yet available).
• Sonowave (http://www.sonoplayer.com) Unshackles Internet Radio From Your Computer.
• Torian InFusion (http://www.torianwireless.com/) Battery operated compact Wi-Fi internet radio (not yet available).
• Allnet Allsound (http://www.allnet.de/) Wi-Fi internet radio.
• Terratec Noxon (http://www.my-noxon.de/) Wi-Fi internet radio.
• Philips SLA5520 and WACS700 (http://www.streamium.com) part of Philips Streamium family that does audio only.

• Audio player (software)
• Digital audio player
• Streaming media
• Internet radio