Wide Area Cellphone Detector with 5 Antennas

Here is a smartphone detector that lets you detect any cell phone call, text or data usage in a 20 meter radius. This Wide Area Cellphone Detector has 5 cell phone frequency antennas capable of detecting LATE 700, GSM 850, 3G/CDMA 850, GSM 1900, and CDMA 1900. The unit comes with an audible alarm with customizable message.

The device has a flashing sign to let you know when a cellphone is being used. It can detect Bluetooth, WLAN, WiFi, cellular phone and digital spread spectrum wireless products. The bad news? Something like this doesn’t come cheap.