Device for locating audio surveillance apparatus - Patent 4264978
A pulse generator is provided for transmitting an acoustic pulse which is sensed by an audio surveillance device and retransmitted as modulated electromagnetic information. Associated with the pulse g … indication that there is a surveillance device in the immediate area, and …
eyespymag.com
… dedicated receiver and the audio clarity far outshines any surveillance device on the market today and at a fraction of …
Security Device: Wireless Color Video Camera is the Perfect Security Device!
Security device for easy home surveillance is affordably priced for home or small business. … Wireless security is EASY with the XCam2, a tiny surveillance device that transmits LIVE COLOR video up to 100 feet …
VHeadline.com - XANDOR: Surveillance technology used in Venezuela by outside agents?
… its ability to use the human being as a surveillance device. It took me about six months to … to them, I was a walking surveillance device. All that I could …