A map of wherever you are is laid under a map of the gps signal from you and your buddies gps enabled cellphones, allowing you to know where they are even when they’re out of sight. God this is cool.
← Daytona Elevator: Residential Elevators,Pneumatic Vacuum Elevators,Wheelchair Lifts,Stair Lifts and Dumbwaiters | MAVROMATIC - DIY: Wireless Weatherproof Outdoor Camera Rig →