1Obdii Interface: Simple mini Obd tracking device; Just plug this Gps tracking device into the Obdii port under the dashboard of any car. 2Geofencing Protection: After setting a certain distance, once the device exceeds the distance, your phone will receive an alert prompt. 3Shock Alert and Overspeed Alarm: Your phone will receive a Sms alert when the device exceeds the distance; once the speed exceeds the set speed, it will alarm. 4Battery Protection: Built in lithium ion battery, remote harassment alarm, if the battery is stolen, the Obd tracking device will send an alarm. 5Large Data Storage Capacity: Historical track storage, can store up to 3 months of historical track; with LED indicator to display Gps working status. 6Multipurpose: Gps tracking devices help monitor your car, monitor your kids' driving behavior, keep your loved ones safe, track burglars, and more.