I am looking to use inertial measurement devices as a locational tool for tracking the movement of objects over time within an enclosed/predetermined area. This application requires the wireless transfer of data and the ability to be on and working for a 3-4 day period. Originally i was going to use traditional gps in smartphones or bluetooth beacons but i came across this technology and it sounds more reliable and interesting. Essentially i am looking for some guidance on what product to use if I want to keep costs to a minimum but still have reliable data. Anything helps.