Spying bugs are not always easy to find, especially without the right tools. The BH-04 Professional Bug Detector by i4 Technology is an advanced bug sweeper that can detect a wide range of bugs from 10 to 8000mHz at 70dB sensitivity. It has 3 modes of operation. In Security Mode, you are warned if a spy device appears within 164ft.
The BH-04 has a lightweight design (7oz). It can detect DECT, GPRS, 3G/4G. GPG, WiFi, and Bluetooth. The device has a built-in frequency meter and a 320 x 340px LCD screen. It has a background subtraction function for removing interferences.