This is perfect for listening to your music with friends and family from iPod orother portable audio devices in your Car without noise interference. It works withyour MP3, CD, or cassette player, and with your PC or laptop to deliver high-qualitysound on the road anywhere you go. The Adapter reduces noise by automaticallymaintaining the correct tension within the cassette deck as you drive, soyou get an outstanding performance. Advantages: 1) No noise and no FM radio frequency interference.  2) Fits front- and side-loading cassette players 3) Allows easy placement of your audio player with 4ft cable 4) Plugs into your iPod, MP3, CD, cassette player, PC, or     laptop 5) Features inner-magnetic and shake-resistant design  How to use? Simply plug the 3.5mm jack plug into your iPod or CD player, pop the cassette intothe car radio cassette and enjoy through your car stereo.Specifications:1) Plastic: ABS2) Magnetic Head: 2ch or 4ch stereo3) Connecting cord length: 4ft 4) Headphone jack: 3.5mm 5) Blister package w/ color paper card printed instruction.The features of this product can be also designed and made as per customer's requirements.Packing: Double blister package, color paper card printed instruction, etc.100pcs/carton