Features: Multiple Positioning Mode: GPS+ AGPS+LBSWorldwide GSM+GPRS 4-frequency System: 850/900/1800/1900MHzTrack: The user's specific location can be inquired through the cell phone APP or the computer Fence: Designate an area on the map by setting the device as the center point and the alarm will be triggered off immediately once the user of the device goes into or out of this area PlayBack: Inquire the moving routes of the device in the past 3 months any for time and anywhereSOS: In for case of emergency, press the SOS button and the device will send out the call and message for help to the guardian Find Device: The lost device can be found through the APP on the cell phoneVoice: With the highly sensitive microphone, the sound around the device can be heard in real for time in for case the emergency happens to the user Remote Power-off/Restart: The device can be turned off/restarted through the APP on the guardian's cell phoneIntelligent Power Saving: The device turns off/on the GPS and data upload in the for time range specified through the APP on the guardian's cell phone Specifications: Material:Plastic Color:Coffee Size:Approx.5x3x1.5cm/1.96x1.18x0.59inches Positioning function: GPS+AGPS+ base station positioning Alarm function: virtual electronic fence, set the area range, and alarm if it exceeds this range. Vibration alarm under certain intensity, low battery alarm Support SOS one-key help, two-way conversation Battery capacity: 850 mA Standby for Time up to 10days GSM network: (Quad band) 2G GSM , 850/900/1800/1900MHz GPRS standard: Class 12, TCP/IP GPS Positioning accuracy: 10-15m GSM/GPS Antenna Built-in design Working ptemerature: -20℃ ~ +70℃ Working humidity: 20% ~ 80% RH Voice Recorder and Monitor Yes SMS coordinate Yes Package Includes: 1x GPS Tracker 1x Cable for Charge 1x Use Manual 1x Hanging Rope note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.