1. Support global GSM network 2. Support network visualization management 3. Large-capacity 32M-ROM+32M-RAM running space, 128G cloud storage space 4. Quickly locate and find the location of the lost elderly 5. The trajectory is clear and the curve is compensated 6. Sub-meter positioning, the accuracy can reach 5 meters, support Baidu, Gaode, Google, satellite, street view map 7. Fence design, intelligent positioning, the equipment will alarm in time when the elderly get out of the fence 8. Running memory: 32m 9. Body memory: 32m 10. Network support: 2/3/4G 11. Sensor: gravity sensor 12. WiFi scanf: support 13. Input: 5V/600MA 14. Interface: USB 15. Battery capacity: 1000mAh lithium battery 16. SIM card type: nano SIM card 17. Featured functions: positioning, navigation, street view, electronic fence, device management, multi-account management, multi-target display, Gaode/Baidu/Google/Satellite map 18. Alarm function: vibration alarm, fence alarm, SOS alarm, displacement alarm, low battery alarm, shutdown alarm, online alarm, overspeed alarm, static alarm 19. Positioning type: GPS, Beidou, WIFI, Bluetooth, A-GPS, LBS 20. Applicable people: Alzheimer's disease, amnesia, mentally handicapped people, hospital/nursing home management 21. Support system: IOS, Android, web page, applet 22. Product size: 7.1 x 4.2 x 2.6 cm 23. Product weight: about 30 grams