"The TomTom Pro 8000 In-Car Satellite Navigator measures 3.3 x 4.7 x 1.0 inches and has a weight of 6.6 ounces. It comes with a touch screen display of 4.3-inches that comes with a resolution of 480 x 272 pixels. This sat nav has an internal flash memory of 4GB, as well as a slot for connecting SD/MMC memory cards. It runs on a rechargeable Lithium-polymer battery that comes with a battery life of up-to 5 hours. Its internal antenna is integrated with a high sensitivity GPS receiver. This sat nav also has an integrated microphone and an internal speaker."