Feature:1. Overspeed alarm.2. Shake alarm:after set this function, if the tracker keep stationary for 5 minutes, this function willstart working. Then once the tracker get shocked, it will send a massage to you.3. Low battery alarm:tracker will send alarm information to you when the voltage lower than 3.5V.4. Real-time online tracking via web server & APP.5. Movement alarm:once you set this function, the tracker will send alarm information to the adminnumber when the movement distance up to 500 meters.6. Voice monitor.7. Waterproof design. Specification: Dimension:80mmx 50mmx 29mm Stand by:3000hoursoperation temperature:-20℃~+70℃ Battery:3.7V 6000m AHNetwork:GPS850/900/1800/1900 MHz WIFI 802.11b/n/g Package Included:1 X ZOOBII A6s Car GPS Tracker