Special drowning detection system for water area and working method thereof
Cargo space unauthorised human occupant detection and alerting system
Road traffic radar early warning control system, method and equipment and storage medium
Vehicle-mounted terminal-based commercial vehicle rotating speed overspeed alarm method
Intelligent traffic early warning system and method based on acousto-optic early warning device
ALARM AND CONTROL DEVICE USING WIRELESS COMMUNICATION
Marine calling alarm device and method suitable for disabled people