Hello all, just got myself a TrackR and realized the distance is pretty limited to the bluetooth range. I am after something about the size of a mobile phone (turning old mobile phone into one works but I am actually needing quite a few) and does not require wifi connection for the location to be returned. DIY blueprint is fine as well, I recall seeing someone making one that's as small as a cigarette pack in Taiwan. Mainly using it for hobby, doesn't need to be super percise as long as the location is pinged back I am happy.