Specifications: With specification: @ cpu:400 mhz processor @ memory:64 mb ram @ display:320 x 240 resolution with 4096 colors @ gps:12 channel all-in-view integrated gps receiver with internal @ antenna @ usb: Allows connection to a pc for updates @ dimensions:4.5 x 3.6 x 2.3 @ weight:11 oz Features: @ plug and go for easy switching from car to car @touch screen operation,3.5 tft screen @ turn-by-turn voice instructions @ compact and portable @ clear 3d navigation @ assisted satellite navigation system (asn) for continuous navigation, even in tunnels @ hands-free calling via bluetooth with mobile phone Voice instructions in more than 30 languages @ choose from over 50 voices @ built-in bluetooth connection @ enabled for tomtom plus services (real time information on traffic and weather - service not included with purchase) @ rechargeable internal li-ion battery @ battery lasts up to 4 hours