Every time you hit the road, your livelihood is at stake. That's why you need more than navigation guidance. In the event of a collision, the incident detection G-sensor automatically saves footage on impact or you can manually save footage with the touch of a button. The Garmin dezl Cam LMTHD unit can easily be removed from its magnetic mount, allowing you to take close-up pictures of any collision damage with the snapshot feature. Optional GPS overlay provides location, speed, date and time to precisely record when and where an incident occurred. It also has detailed maps for North America that also include truck-related restrictions like bridge heights, sharp curves, weight limits and related information for most of the major roads and highways. dezl Cam LMTHD Features : Guides to Proper Lane for Navigation Displays Street Junction Signs Truck-specific POIs & Services Displays Speed Limit for Most Roads Wireless Backup Camera Compatible Battery : Up to 30 Minutes Per Charge FREE Lifetime Maps & HD Traffic Updates Voice-Activated Navigation Bluetooth - Hands-Free Calling