Features:1. the volume is ultra-small, GPS is positioned within 10 meters, and can be positioned globally.2. the call is clear, remote control.3. computer, mobile APP view baby and convenient.4. set up an administrative account, managing multiple devices is more convenient.Specification:Multiple positioning modes: GPS + AGPS + Wifi + Beidou + LBSProduct size: 80*45*30mmBattery capacity: 5000 mAhUniversal GSM+GPRS quad-band system: 850/900/1800/1900MHzLocation query: the user's specific location can be queried via mobile phone or computerElectronic fence: delineate an area on the map with the device as the center, and alarm immediately when the area is outHistorical trajectory: query the equipment running trajectory within three months any for time, anywhereSOS for help: In an emergency, press the SOS button to send a distress call and message to the guardianContacts: add/check supervision numbers (SOS, father, mother)/whitelist/friends (50 in total) through the guardian's mobile APPTwo-way conversation: when the address book number comes in, you can talk to the userFind device: If the device is lost, the device can be found through the mobile APPDevice alarm: set through the guardian's mobile APPClass anti-disturbance mode: set the do not disturb for time range through the guardian's mobile APP, and the device will block incoming callsRemote shutdown: the device shutdown function can be realized through the guardian's mobile APPRemote restart: The device restart function can be realized through the guardian's mobile APPfor Smart power saving: turn off/on GPS and data upload within the for time frameMobile client/computer service platform/GZH, multiple control methodsQuantity:1 SetNote:1.Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid.2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package includes:(No Retail Packages)1 X GPS Tracker1 X Collar for Animals1 X Cable for charge1 X Use manual