A host of iPod-compatible products are making their appearance at giant US music trade show, NAMM, which opened for business yesterday, including an iPod-friendly mobile PA system.

Alesis introduced the TransActive Mobile at the show yesterday. It's a fully-functional professional quality mobile PA that's equipped with flight-case style roller wheels and an extendible handle for transportation.

The system integrates a Universal Dock for iPod, so you can pump music from the Apple player out through the two-way speaker system, which promises sound fidelity to over 150-feet.

The TransActive Mobile holds a long-lasting rechargeable battery, so you can use it anywhere, and also offers four inputs for musical instruments of other devices.