FM Transmitter

An FM transmitter is a product that allows sound from another device to be played through an FM radio. They can be used to play music from MP3 players, cell phones, smartphones, computers, CD players and other devices over a vehicle's stereo system. Since the FM transmitter sends the sound out through and FM signal picked up by the radio, the vehicle doesn't need to have its own CD or MP3 player installed.http://reviews.cnet.com/fm-transmitters/sony-ericsson-mmr-60/4505-13575_7-31783820.html?tag=lia;rcol

Electronics brands that sell FM transmitters include Belkin, JVC, DLO, DreamGear, Radian, Delphi and Griffin. Many manufacturers of cell phones and MP3 players also sell accompanying FM transmitters for their products. These brands include Sony, Motorola and even Microsoft, who creates a variety of accessories for their Zune line of music players.http://www.cnet.com/topic/fm-transmitter.html

High powered FM radio signal transmission requires a commercial license in many parts of the world. However, personal FM transmitters are legal in most jurisdictions because of their extremely low signal strength that is unlikely to interfere with other FM transmissions from farther away. However, Hungary and Poland both require the user possess a license before using a low powered FM transmitter. Some countries also permit FM transmitters to be sold, but then heavily regulate or ban their use.http://www8.garmin.com/legal/legalnotices/fmtransmitter.jsp