Rescue wristband for detecting drowning and sending out rescue signal
Arrival reminding system for passengers to take train and implementation method thereof
Communications system control unit and releasable attachment mechanism
AUTOMATED INDIVIDUAL SECURITY THROUGH A WEARABLE AERIAL DEVICE
Multifunctional portable control device, wristband and multifunctional control system
Dispositivo, sistema y método de fijación controlable mediante un brazo mecánico
DISPOSITIVO, SISTEMA Y MÉTODO DE FIJACIÓN CONTROLABLE MEDIANTE UN BRAZO MECÁNICO
Vehicle-mounted fatigue driving detection system and wearable reminding bracelet