... GPS Tracker TK368Manufacturer SpecificationsPrimary Function: GPS Tracker with SMS and Two Way Calling SIM Card Compatibility: 2G, 2.5G, 2.75G ... cellphone number. Package Contents for TK368Global GPS Tracker (Quadband, Two Way Calling, SMS Alerts) Rechargeable Li-ion Battery (3.7V ... speaker and MIC? Yes, the Global GPS Tracker (Quadband, Two Way Calling, SMS Alerts) comes with a built-in speaker and ...