GSM Stealth II Cell Phone Detector with White Noise

Here is a cell phone detector that can find eavesdropping devices and also relies on audio interference to keep you safe. The GSM Stealth II has 3 LEDs and an alarm that lets you know when a telephone starts exchanging data. It has different visual and sound cues for different communication protocols. The NG2000 detects GSM 900/1800, CDMA850 WCDMA2100 (3G, UMTS). The battery life lasts up to 5 days. Sets you back under $300.