MPTRONIX Ultimate Music Player. Available now for SRPs starting at $399.99. This mobile MP3 player has a design which uses a Palm OS PDA as the controller. The PDA connects to the player via a proprietary cable and the company says that it will soon start selling a Bluetooth option for wireless PDA control. The device ships with either a 20, 40, 60 or 80GB cartridge drive, which has USB 2.0 connectivity for transferring files. It also has a built in FM transmitter for wireless audio to any radio. Also available is a line of accessories, including custom mounts and a steering wheel remote. Call (770) 962-7123 or visit www.mptronix.com.