Dual frequency alarm device using Doppler effect for sensing a m
Dual frequency anti-theft system
Dual frequency radio tag for a radio frequency...
Dual frequency RFID circuit
Dual function optic sleep preventing device for vehicle drivers
Dual hydraulic braking system for vehicles
Dual liquid level monitor
Dual mode electronic intrusion or burglar alarm system
Dual mode moving target sensor
Dual mode panel
Dual mode personal locator beacon
Dual mode RF power amplifier
Dual mode RFID device
Dual optical level monitor
Dual orientation metal scanner
Dual power security location system
Dual pressure change intrusion detector
Dual projected-beam smoke detector
Dual security label
Dual security label