Overview: This product TK911 is a 2G GSM GPS Tracker which is designed specially for pets, especially for dogs and cats. It is working based on the existing 2G GSM/GPRS network and GPS satellites, which this device, you will can locate and monitor your lovely pets remotely by SMS, mobile APP and web tracking software! It adopts the most advanced technology of GPS, WiFi and LBS three positioning ways !Besides, it supports GSM Quad Band Frequency(850/900/1800/1900Mhz), can work perfectly around the worldwide! Functions: 1. GPS+WiFi+LBS Three Positioning Ways: If the gps signal is good, the device will locate via gps satellite, if not, the device will locate via WiFi, if the GPS and WiFi signal both are not good, then the device will locate via LBS! Under GPS locating mode, the accuracy is 5-10 meters, under WiFi locating mode, the accuracy is 5m, under LBS locating mode, the accuracy is 100-1000 meters!2. Realtime Tracking: You will can realtime track the device on google maps via mobilephone, tablet and computer, and the minumum data upload interval is 10 seconds!3. History Route Playback: The APP and web server can record the upload data of the device up to 6 months, you will can playback the history route at any time! 4. Long Standby Time: It has built-in 3.7V 500mAh Li-ion battery, can standby up to 200 hours.5. Waterproof: The waterproof level of this device is IP66, it can resist splash water but can't be put under water! 6. Overspeed Alarm: This alarm works only under continuous positioning mode.When the unit speed is exceed the speed you presetted, it will send message speed alarm! to the admin number every 5 minutes. 7. Shake Alarm: After you did the shake alarm setting,please keep the tracker being stationary for 5 minutes, then this function will start working. It will send SMS sensor alarm! to the admin number when the unit get shocked.8. Movement Alarm: When the units stays immobile in a place for 10 minutes, the user can set up the movement alarm by this command "move+passord", then in case the device moved 500m it will send alarm SMS "Move Alarm+Latitude and longitude" to the authorized number.9. Geofence: Set up a geofence for the tracker to restrict its movements within a district. The unit will send alarm information to APP and web server when it goes out of or get in this district. 10. Sleep Mode for Saving Battery:* Sleep by time mode: After did this setting, tracker will only work for 5 minutes after being waked up, and back to sleep mode, GPS will shut off and GSM will works in low consumption mode. SMS, call will can wake up the tracker.* Sleep by shock sensor mode: After did this setting, if no shock for 5 minutes, the tracker will work under "sleep by shock" mode, GPS will shut off, GSM will works in low consumption. Vibration, SMS, call will can wake up the tracker.11. Contact Charging Design, more convenient and more faster for charging !12. LIFETIME FREE WEB TRACKING SOFTWARE AND MOBILE APP!