Tom Tom redesigns sat-nav systems

Now with built-in windscreen mount and clearer voice prompts

Tom Tom has redesigned its Tom Tom One and XL sat-nav systems.

The new Tom Tom One and XL include a new windscreen mount that folds flat onto the device when not in use.

Both systems also have an enhanced voice instruction system, with prompts that the company claims are clear and loud enough to be heard above a car radio "or a car full of excited children".

They also include Tom Tom's Map Share system. This enables drivers to improve their own maps or to receive corrections from other users via Tom Tom's Home software installed on a computer.

Tom Tom chief executive officer Harold Goddijn said: "The updated Tom Tom One and Tom Tom XL are now even more desirable, offering a combination of unrivalled ease of use, extreme portability, and the most comprehensive and up-to-date maps.

"The distinctive design, with the convenience of the Easyport mounting solution, will appeal to customers looking for a compact, smart, ultra-portable navigation solution."

The Tom Tom One has a 3.5in touch screen display, while the XL has a 4.3in widescreen display. The new models will be available from from May 2008, with prices for the One starting at about £150 and the XL at £180.