Adventure Pilot iFly 520 (with Streets) Sunlight Readability: Like its big brother, the iFly 520 is sunlight readable and provides both VFR and IFR situational awareness in a simple-to-use 5 Touchscreen. Perfect for bright cockpits. Untethered Power: The new 5 design accommodates the internal lithium-ion battery for cord free flying up to 2 hours when ship power is not available. The 520 is the perfect ultra-portable GPS for any pilots flight bag or a backup option. AutoTaxi+ and RealView: Automatically transition to and from the Airport Diagram upon takeoff and landing. The iFly adds the + with over 12,600 Realview airports. If no official Airport Diagram is available, AutoTaxi+ uses the RealView Image. RealView also makes it possible to see both public and private airports before you arrive. Know the airport like a pro! Active Alert System: As you fly, the iFly GPS uses its Active Alert System to monitor and generate warnings of approaching concerns. Configurable by airspace type, distance, altitude bufferreceive warnings based on your flying style with comprehensive alerting in one central location. Other key alert types include: Airspace, Terrain, Obstruction Warnings and Vertical Speed to Target Alerts and more. Satisfaction Guaranteed: Try it for 30 days. If you are not satisfied, return it for a full refund.