4GLTE + 3GWCDMA + 2G GSM universal network Waterproof grade IP67 GPS + Beidou global satellite positioning, outdoor accuracy 5 meters Website platform/mobile app to query location information Vibration detection and alarm sound detection alarm Door magnetic detection alarm (optional) Loudspeaker high-frequency alarm/sound search Track playback/Geo-fence Low battery/changing card alarm Faster, more user-friendly quarantine management. Automatically report the help records of quarantined personnel, providing accurate data basis for the management efficiency of quarantined personnel. Efficient waterproof effect, easy to deal with various complex environments such as indoors, outdoors, and gardens Computer, mobile app, SMS multi-platform real-time monitoring, support multiple people to log in at the same time. 2000mAh or 4000mAh battery, to meet the needs of long hours of work Low battery automatic alarm, timely charging, to ensure the normal use of product functions