• Excellent GPS performance: With its high-sensitivity, SBAS-enabled GPS receiver, NAVA locates your position quickly and precisely and maintains its GPS location even in heavy cover and deep canyons.
• Long battery life: Powered by two AA batteries, NAVA can work for up to 15 hours. Powered by special  Li-ion battery, NAVA can work for up to 25 hours.
• Multi-power source: NAVA GPS can be powered by 2xAA, Li-ion, USB, vehicle power adapter, AC adapter.
• Micro SD expandable: Uses a Micro SD card to enlarge the storage memory up to4G. The card slot is located inside the waterproof battery compartment, so you don't have to worry about getting it wet.
• Lightweight and compact:  NAVA is lightweight and compact — the perfect size for all your travels.
• Waterproof: IPX7
• Readable under sunlight: 65k colors Transflective TFT LCD
• Fast data transfer: USB 2.0
• Drop resistance: 1.5mdrop from all 6 edges
• User data compatibility: Export and import user data from gpx, shp, kml, dxf, csv to NAVA proprietary format. 
• Worldwide Basemap, city detail map, topo map support: NAVA400 supports built-in worldwide basemap with countries boundaries and main city details.Other maps are optional and the complete list of available countries and related pricing is available upon request. 
• Shortcut key: Mark your current location as a waypoint directly by the MARK key.
• User POI icons: You can design your own POI icons and load it to NAVA unit