Sweep a room from outside the door with this highly efficient bug detector. The Zap 270 is simply the best bug detector available. It scans for high frequency (HF), short wave (SW), VHF, UHF and microwave frequencies. The Zap 270 utilizes advanced circuitry designed for the cellular phone and telecommunications industry. These components allow the Zap 270 to detect the weakest signal down to baseline ambient levels of radio frequencies (RF). With a range of 10 MHz to 4.5 GHz, the Zap 270 can detect almost any bug or eavesdropping device on the market today. Bug Detector with Antenna.
 

Advanced Features Include:

• Directional antenna options.

• Analog Meter and LED Displays.

• Silent Vibrator and 3 Detection Modes.

In Linear Mode, it can be used for far-field (beyond 25 feet) detection of high frequency transmitting devices. Mid Mode can be used to sort through multiple signal sources, and Logarithmic mode can detect close in vicinity devices. Requires 2 "AA" batteries (sold separately).