Profesesional Cell Phone Detector: quickly detect cell phones

With the advancement in technology and cell phones being used in schools, prisons, and places they shouldn't, it's more important and imperative that individuals and businesses take extra measures to catch and prevent unauthorized cell phone use. The cell phone detector is an advanced device dedicated for just this!  Whether you have public safety needs or want to prevent users from cheating on exams or tests via cell phone, this device will alert you when any cell phone is on or has been activated within a 30 feet radius.  It doesn't matter whether users attempt to send SMS text messages or use data services to connect to the Internet on their mobile device, if the phone is turned on, this device will let you know. This model is designed and built for detecting services in the US and Canada, and thus detects GSM (880-915 MHz), CDMA (824-849 MHz), WCDMA (1920-1980 MHz), and DCS (1710-1785 MHz) and is not effected by local cell phone towers.  Thus unit it small, portable, and operates in either a silent/vibration mode or via the included earphone. Technical Specifications:

Cell Phone Frequency Ranges GSM (880-915 MHz) (up-link frequency bands) CDMA (824-849 MHz) (up-link frequency bands) WCDMA (1920-1980 MHz) (up-link frequency bands) DCS (1710-1785 MHz) (up-link frequency bands) Antenna Dual band dipole omni-directional (maximum gain at vertical position) Sensitivity GSM better than -55 dBm @ antenna  CDMA & WCDMA better than -65 dBm @ antenna Rejection >25 dB @ out of band Detection mode RF power peak detection Rotary tuner On-off switch + squelch control (rotate clock-wise to tune on power and increase sensitivity)  Power Li-battery (single, 1800 mAh @3.7 VDC) Charger Input 100-240 VAC, 50-60Hz  Output 5V DC, 1A max Output Vibrator and Alert modes Indicators Yellow LED: power on, Yellow LED dimmed: requires recharging   Red LED: Charging in progress, Red LED Off: Charging completedOperation time  Stand-by > 20 hours, Nominal > 18 hours, Vibrator continuous on > 8 hours   Dimension  96mm L x 60mm W x 23.5mm T (120mm with antenna)  Weight  110grams (including battery)

Includes:

• Cell Phone Detector
• Battery Charger
• Earphone
• Rechargeable battery