to show the precise location and provide visual and spoken directions on how to drive to the specified destination. Some TomTom systems also integrate with mobile phones using Bluetooth, traffic congestion maps or to actually take calls and read SMS messages aloud. Navigation devices TomTom's all-in-one GPS navigation devices come with a touch screen, speaker, USB port, internal Lithium ion battery. Most models have Bluetooth transceivers that allow connection to a smartphone, allows the device to be used as a speakerphone to make and receive handsfree calls. TomTom Go, Via and Start – general purpose navigation devices. TomTom Camper & Caravan / RV – these models have a map that is supplied with height and width restrictions, which allows vehicle size and weight data to be entered for the route planning. TomTom Truck – designed for professional truck drivers and include truck-specific software and maps. TomTom Rider – Portable water-resistant models for motorcycle and motorscooter users. They differ from other devices in that the Rider is partly shielded and has a 'glove-friendly' screen and GUI. TomTom One and One XL – The TomTom One is the base model for automobile navigation. The difference between the TomTom One XL and the TomTom One is the size of the touch screen (4.3 vs 3.5 in or 110 vs 89 mm). Neither model of the One contains the added functions included in the Go models, such as Bluetooth hands-free calling and MP3 Jukebox. However, the One is able to receive traffic and weather updates using the TomTom Plus service when paired via Bluetooth with a mobile phone with a DUN data service. The reduced software capability means less demand on the hardware, which allows the One to be sold at a significantly lower price than the Go. The XL is also available as a Live version with integrated Live Services. Navigation software TomTom Navigator – a GPS navigation software product for personal digital assistants (PDAs), Palm devices, Pocket PCs, and some smartphones. TomTom Navigator 6 replaced the earlier TomTom Mobile 5.2. It can use GPS receivers built into the device or external (e.g., Bluetooth-connected) receivers. Navigator 7 was the latest release of this software, released as a part of the software that came with the June 2008 HTC Touch Diamond. Frequently used functions can be added to the main screen of the program, and users can report map corrections and share them with