1Parameter: 7 inch high resolution capacitive screen with 800x480 resolution, built in Sdram 256MB Ram, 800MHZ Cpu, support USB 2.0 connection, with about 2 hours of stand by time. 2Main Function: The navigator can provide a variety of route selection, route planning, route history preservation, support for multilanguage choice, and voice broadcasting. 3Reminder: Voice and image indications of speed measuring devices, cameras, dangerous objects, low bridges, restricted intersections, 3D navigation view to ensure you don't get lost. 4Audio Output: Output audio from navigator to your car stereo, Fm transmitter. Transmit Gps sound to car instead of Fm Radio. Support headphone port audio output. 5Application: Support car, ambulance, bus, taxi, truck route planning, when the mode of the truck is set, Gps will tell you the length, width, height, and weight of the road.