The home page of Yi Tracker2 is a monitoring center page with Google Map, the user will see all his GPS trackers immediately and select the trackers he wants to check. It tracks the objectives in real-time, update its location every 10 seconds. The six months historical route can be played back via Yi Tracker2. The function of geofence is a perfect design for fleet business and valuable renting business, the user can draw a safety boundary that limit the activity of their vehicles. It will produce the alarm message and notify you when tracker get into or out of the safety boundary, make sure the vehicles is under your control.