1、Personal Locator: The tracker has a built in GPS personal locator. GSM, SMS communication or GPRS connection. 2、Real Time Positioning: GPS and LBS accurate real time position. SOS button to help you in emergency situations. 3、Tracker: Tracking locator supports single position and continuous tracking. Support position caused by tracker. 4、Alert Reminder: Geo fence protection, set a certain distance, once the distance is exceeded, your phone will receive an alert reminder. 5、Overspeed Alarm: Once the speed exceeds the set speed, it will alarm. Motion alarm, timely monitoring of your vehicle status, anti theft. Item Type: Locator Model: TK102 Material: ABS Color: Dark Gray Network: GSM GPRS Frequency: 850 900 1800 1900MHz Gps Sensitivity: -159dBm Gps Accuracy: Approx. 5m/16.4ft Gps Positioning Time: 45s (Cold Start), 35s (Hot Start), 1s (Hot Start) Supporting Battery Type: 2 x 3.7V/850mAh Lithium Battery (Included) 1 x Locator 2 x  Battery 1 x Plug 1 x Power Cord 1 x Magnetic Back Cover 1 x English Manual