Do not need to guessing where your family are, where your valuable assets are when you not around. Our Dooreemee GPS tracker can do real-time tracking. Perfect for tracking vehicles, teens, spouses, elderly persons or assets Our GPS tracker is small size very portable can put in anywhere, like under vehicle frame, inside glove box. Etc. Can Insert in your children or old parent backpack and pocket. It has variable data upload setting. You can set down to 30s and up to 120 min on upload data interval. WHEN the interval set in 30s, this device only can working for 1 day. The battery working time is base on data upload interval. This device do not have any additional charge. Before you using you need to prepare one sim card and make sure it can use internet service. (this device do not support CDMA frequency) Just need to download 365 GPS app in your PC, tablet and cellphone, set up your sim card in the device. Then you can enjoy the REAL-TIME GPS tracking. This GPS tracker can save 1 year tracking history. Can play back the tracking history for each day, even for one hour. The device will automatic record your route history. When you don’t know how to active the device. Please contact with us first. Thank you for support us.