Kleer's high-quality wireless audio can be built into an MP3 player or added as an accessory.

The stereo A2DP Bluetooth profile means you can have headphones without any cables at all - but the sound quality isn't nearly as good as with wired headphones. RCA's JetStream MP3 player (due sometime "in the spring") will be the first device to offer wireless headphones using Kleer's CD-quality wireless headphones. The lossless 16 kHz audio sounds significantly better than Bluetooth, and the wireless module is so small and low power that it fits into earbuds rather than on-ear cams, yet still has a five-hour battery life. With only slightly larger earbuds, like the ones that come with the JetStream, you'll get up to 12 hours of battery life - significantly longer than most Bluetooth headphones, and with a longer range as well (up to 30 feet).

Kleer has a prototype iPod Nano adapter for the headphones, which will have a ten-hour battery life; the company expects to see several headphones, MP3 players and iPod adapters on sale by the summer. As with Bluetooth, you can pair the headphones with multiple devices, so there are Zune-style options to send music to play on a friend's headphones.

Not just a long-distance Bluetooth headset, the Siemens ZX1 improves the sound, connects to your TV, and lets you share music with friends.

Siemens is sticking with A2DP Bluetooth for the ZX1. It's a Class 1 Bluetooth headset with a range of 300 feet that ships in April, which the company says is "meant to look like an Egyptian hieroglyph". It includes noise reduction and digital signal processing, which improves the usual audio quality - plus it has a socket for you to plug in your favourite headphones. If you find a friend with a ZX1, you can share music from one player on up to five headsets, and talk to each other while you're listening. And if you don't want to play music from your phone, plug the ZX2 adapter in to a PC, TV or stereo system - anything with a headphone socket - to listen to that instead. If you're listening to music from your stereo and a call comes in on your mobile (or a Bluetooth enabled cordless phone, which Siemens would also like to sell you), you can take the call on your headset. Handily, you get separate volume levels for music and phone conversations, so having your favourite track on loud doesn't mean you'll be deafened by callers.

Add gigabytes of storage to a Bluetooth phone with Seagate's DAVE drive.

Seagate is finally bringing out a Bluetooth hard drive, although it hasn't yet decided whether it will sell the DAVE (Digital Audio Video Experience) drive directly as well as through network operators. (Orange in the UK has already decided to carry DAVE as part of its business portfolio.) The drive has a mini USB connection for charging and for connecting up to a PC to copy files on in the first place, but you access it from your phone by Bluetooth. That means you have 20 GB of music, photos, GPS maps and any other files you find it hard to cram into the paltry memory on most smartphones (and it will be 60 GB when Seagate switches to a 1.8" drive). For security, the device only pairs with one phone at a time, so passers-by can't rummage through your confidential data or bootleg your music.

You'll be able to save images from your phone camera straight to the DAVE drive, or download video over the network onto it. Pair that with something like the T-Mobile Ameo, and you could leave your laptop at home for a business trip, add it to a music phone and you've got days' worth of music. Plus, you'll never have to worry about getting files off an old phone when you buy a new one. DAVE could be the most useful wireless device that ships this year.