A compact, stand-alone device, the Monimoto GPS Tracker is powered by two single use, long-life batteries that can be easily installed and switched from one bike to another, when needed. When movement is detected or the paired key fob isn't nearby, the device calls your phone in under a minute, providing GPS coordinates and previous locations in an event log. CellLocate® technology from U-blox allows the bike to be tracked when taken indoors or if there's no GPS available in the area, by using surrounding GSM towers.