Product details: Multipurpose: GPS tracking devices help monitor your car, monitor your kids' driving behavior, keep your loved ones safe, track burglars, and more. Shock 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. OBDII Interface: Simple mini OBD tracking device; Just plug this GPS tracking device into the OBDII port under the dashboard of any car. Large Data Storage Capacity: Historical track storage, can store up to 3 months of historical track; with LED indicator to display GPS working status. Battery Protection: Built in lithium ion battery, remote harassment alarm, if the battery is stolen, the OBD tracking device will send an alarm.