The Clié PEG-SJ30 features a 320 by 320 pixel 65,536-color TFT (thin film transistor) LCD (liquid crystal display), is based on a 33MHz version of the Motorola DragonBall VZ processor, has 16Mbytes of built-in main memory, runs version 4.1 of the Palm operating system, has a MemoryStick slot and includes mini-USB (Universal Serial Bus) and Enhanced IrDA infrared interfaces.
The SJ30 measures 72mm by 104mm by 17mm and weighs 139 grams including the stylus.
It is one of two new PDAs from Sony that is based on the low-end SL10 model launched in the US in July as Sony targeted teenagers. The PDA had a monochrome screen and cost $150 (£97).
The other new PDA, the SJ20, also appeared two weeks ago and has the same monochrome screen as the SL10 but a rechargeable battery pack in place of the disposable batteries used in the SL10. Sony added a colour screen to create the SJ30.
Sony is also putting on sale a game controller. The small keyboard clips onto the lower part of the SJ30, covering the buttons and graffiti area but leaving the rest of the screen exposed.
The SJ30 costs $300 (£194) and the game keyboard is $40 (£26) in the US. It is not yet available in the UK.