Last week, we looked at a Bluetooth desktop system; the HBM-30 is a way to take hands-free call management on the road. It's a simple MP3 player, with Sony headphones, text LCD screen and a 64MB Memory Stick. Load some MP3 tracks from your PC onto the Memory Stick (we recommend using a USB reader, sold separately) and insert it into the player. But it's also a handsfree headset with built-in microphone.

The magic is in the combination. Once you've "paired" it with a Bluetooth phone, incoming calls will cause it to pause the music and start ringing. You just push one button to pick up the call and, once you're through, another to hang up and resume your tunes. Your phone, meanwhile, can be anywhere up to 30 feet from you, including at the bottom of your backpack or purse.

Callers on the other end sound great — they ought to, since they're coming through a fine pair of Sony headphones. The catch is that your voice may not be as great: the microphone is on the player, so it must be exposed, ideally two feet in front of your face. Battery life is another concern. You can only talk through the player for six hours on one AAA battery, and playing MP3s also uses up the juice.

Not original yet gloriously frivolous enough? Try the CAR-100 remote-control car. Similar to Radio Shack's Zip Zaps but over three times the price, it receives steering and acceleration commands from the phone's keypad. It doesn't get far on a single battery charge, but it's pretty quick and has a tight turning ratio for quick getaways. Although the mechanics of CAR-100 technically work with most Bluetooth phones, you charge the batteries by plugging it straight into a Sony Ericsson phone. Pet lovers take note: the sight of a cat alternately diving for the CAR-100 and diving out of its way is camcorder worthy.

To check on general Bluetooth phone compatibility, visit bluetooth.com.