Six weeks after the introduction of Apple's much-hyped iPhone, a whole new industry has cropped up — the iPhone accessory market.

From cases to screen protectors to mobile chargers to Bluetooth headsets, a dizzying array of gadgets and gizmos aimed at enhancing the iPhone experience is being marketed in hopes of getting still more money out of those who shelled out $400 to $600 for the iPhone.

I have three favorites that I can recommend.

n Bluetooth headset. I'm torn between two of them. The first is the headset that comes from Apple (www.apple.com/iphone/accessories), a $129 minimalist hunk of black plastic that measures an inch and a half or so, is about as thick as a pencil and comes with an earbud attached to the end.

What makes this headset so attractive is that it comes with a cradle that has two slots: one for the iPhone to charge or synchronize with the music and files on your computer, the other for the headset to charge. There's even an audio output jack to play music from the iPhone on an external speaker system.

The convenience of charging the headset and the iPhone in the same cradle is very appealing.

I also like the quality of the audio. Volume is adequate, and those I talk to say they like the way I sound. My problem with the Apple unit is range. Apple advertises a 30-foot coverage area with the headset. I got more like 3 feet.

Apple, however, sent another headset, and it worked better.

The Bluetooth headset that I like best is called the Jawbone. It sells for $119 and is available online and at Apple and AT&T stores. I easily get 25 to 30 feet of range with the unit I bought.

This one has built-in noise cancellation features that make it outstanding. In the car, it filters out wind, road and air-conditioning noise. Same in crowded rooms and outdoors.

You can hear a demonstration of this from the Jawbone site at www.jawbone.com.

n Vibe headphones. I've been using the $99 Vibe Duo (v-moda.com), a headphone-headset combination. If you get a call while listening to a song or watching a movie, the phone is switched over to the headphone and a built-in microphone sends your voice to the caller.

The Vibe stays in my ear, even when I'm working hard on an elliptical trainer. And instead of flimsy, easy-to-pinch plastic-coated wire, it uses durable black fabric-covered wires that don't crimp or tangle as easily as Apple's standard-issue white earbuds.

n Mobile charger. I use one called the PowerJolt from Griffin ($19.99, www.griffintechnology.com). It comes with a detachable 4-foot cable. One end fits into any 12V accessory outlet or car lighter jack, the other into your iPhone or iPhone cradle.