4G GPS Tracker Waterproof Real-time Tracker Device with SOS

Accurate GPS positioning outdoors.
LBS and Wifi for accurate indoor positioning.
Waterproof IP 67.
Support 4G network.
Make call and answer call.
SOS alert.
History playback.
Voice monitoring.
Very accurate positioning (GPS + LBS + WiFi + Beidou). Free app tracking. Establish a safety zone and alarm when personnel leave the safety zone.