BugHunter Professional - RF Analog & Digital Bug Detector

BugHunter Professional CR-01 is a credit card sized bug detector with a rechargeable battery and an easy to use interface. With a wide frequency range of 10 to 3500 MHz and an unprecedented dynamic range of 70 dB, it is designed to detect digital or analog audio and video recording devices as well as cell phone jammers, Wi-Fi, and active cell phones.   Highlights - Credit card size compact design - Built in filters blocks background signals minimizing interference - Effective range between 16-164 feet - Detects analog and digital bugs by switching modes - Coverts entire frequency range of most bugs from 10 to 3500 MHz - Built-in battery with USB charging   An active filter helps eliminate background signals and minimize interference from cell phone towers and radio signals. It can operate in analog mode for constant signal searching, digital mode for impulse transmitters, and security mode that will signal only when new sources of radio signals appear in the room.     How it works?