If sound quality matters to you, as when playing music or watching a video, you should get a good pair of headphones. Apple makes its own In-Ear Headphones made especially for their devices. These are a lightweight set of headphones that deliver sound quality that's top notch. If you have an iPod, you may also use these headphones with it, and even control it with a remote that is included with it. This brand of headphones use high tech silicone tips that are both comfortable and effective for isolating the sound. The Belkin TuneCast Auto Live FM Transmitter is a useful device for transmitting music from your iPhone 4 to the stereo system in your vehicle. This unit also uses GPS assisted scanning, meaning that it will automatically locate the FM station that has the best reception based on your present location. As reception can change quite significantly as you drive, this is definitely a convenient function. It allows you to control your car's stereo system with your iPhone or iPod without the usage of any wires. cell phone tracking For anyone who drives a lot and wants to make the time pass faster with great sound, this is something worth considering. In conclusion, you could find all kinds of iPhone accessories, but you should focus on the ones that you can really make good use of. Most people won't need every accessory available, despite how enticing they can sound. You might find some of these accessories really helpful for you, but not others. Regardless, keep an eye open for any new accessories that may arise, as you might just find the right ones for you. .