Feature: 1. Support PIR infrared induction, human infrared trigger, GPRS real-time positioning, tracking and monitoring. 2. You can set the update frequency in minutes, after setting a specific number of minutes, the detector will update the network information every few minutes. 3. Prevent accidental shutdown. After the detector is turned on and working normally, it cannot be turned off by pressing the button, the only way to shutdown and restart it is the phone application. 4. Set the guardianship number to use the voice guardianship function, and automatically block the incoming calls of the numbers that are not guardianship numbers to prevent harassment of the phone. 5. After the monitor is turned on, the detector actively dials the set number. The detector cannot hear the sound of the mobile phone. The mobile phone can monitor the detector without any prompts such as vibration. 6. You can view the member's current day and historical footprint (3 days), footprint display and list and map modes, the system provides both automatic playback and manual viewing. 7. After setting the electronic fence in the group setting of the same machine, the locator will remind you to enter and exit the fence. Specification: Condition: 100% Brand NewItem Type: GPS LocatorMaterial: ABS PlasticColor: Black.Battery Capacity: 450 MAh (Built-in) Standby Time: 5 Days Positioning Method: AGPS + LBS Positioning Accuracy: AGPS Positioning 5-15 Meters/16.4-49.2ftLow Battery Alarm: Support Package List: 1 x AGPS+LBS Locator1 x Plug1 x USB Data Cable1 x Manual