Waterproof GPS Tracker Geo-Fence Google Map for Car Vehicle Portable (GT08S-TN). Real-time GPS Tracking: Track via SMS, GPRS, or Google Maps with latitude, longitude, speed, and direction. Multi-Alarm Security: Includes over-speed, vibration, door open, SOS, and engine cut-off alarms. Wide Voltage Range: Supports 10V-60VDC, suitable for cars, motorcycles, and trucks. Long Data Storage: Built-in data logger stores up to 5000 waypoints for history replay. Two-Way Communication: Supports voice monitoring and two-way talking with speaker customization. Backup Power System: Built-in 3.7V 350mAh Li-ion battery sends power failure alarms immediately. 1-Year Warranty: Covers all mechanical defects with free parts and labor for one year. Fast GPS Lock: A-GPS function enables hot start in 1 second and warm start in 2 seconds.