This is a cell phone signal block  engineered to protect your business / family privacy and safety. It is a high-tech product; It can block any GSM/CDMA/DCS/PHS/3G cell phone signal at a distance of 5-10m (radius) within which cell phone cannot be called in or called out. And it won't interfere with other devices within the range.  * Features:  1) Brand new and quality cell phone signal jammer  2) Creates enough interference to block all cell phone signals around you (GSM / CDMA 850MHz~970MHz / DCS/PHS 1805MHz~1930MHz / 3G 2110-2170 MHz )  3) Fully metal construction - creates a solid and techie feel  4) Creates a 5~ 10m radius of cell phone signal block out area  5) Built-in 700mAh Li-battery  6) Low power consumption and will do no harm to human body and environment-friendly  7) Light weight, Easy to carry  * Specification:  1) Output port: CDMA/GSM; Output frequency: 850~970MHZ  2) Output port: DCS/PHS; Output frequency: 1805~1930MHZ  3) Output port: 3G; Output frequency:2110~2170MHZ  4) Product size: 10x5.2x1.3cm  5) Weight: 72g  * Perfect for the following occasions: Police and Meeting Room, Security Services, Military Units, Prisons, Banks, Churches, Conference Rooms, Classrooms, Secret Services, News Conference Rooms, Libraries, Museums, Customs, Houses. *** Spedizione in 24H