Powerful pocket-sized mobile phone jammer for disabling an nearby public mobile phones operating on many various bands, including the new 3G band. This portable mobile jammer can easily be hided inside your pocket or handbag, and has an effective range of up to 20 meters. This is an ideal telecommunication gadget for any place that needs peace and quiet, including meeting rooms, restaurants, churches, theaters, and comes with a long lasting rechargeable Li-ion battery built in. Specifications: CDMA: 850-894MHz 20dBm 6dBm/30Khz (min) GSM: 930-960MHz 20dBm 5dBm/30Khz (min) DCS:1805-1850MHz 20dBm 2dBm/30Khz (min) CDMA 1900:1900-1980MHz 20dBm 2dBm/30Khz (min) 3G:2110-2170MHz 20dBm 2dBm/30Khz (min) Jamming Diameter:: 3-15M weight 150G Dimension(l*w*h): 9.5cm*4.5cm* Accessories: This portable jammer consists of many subassemblies. They include mainframe(with built-in storage battery), different kinds of antenna, charger. We will make a brief introduction about the main subassemblies' funtion. Antenna: Omni-directional antenna (CDMA/GSM/DCS?CDMA1800/3G). When connecting the antenna with the machine, please be sure to connect as the indication on the machine. Charger: Charger AC220V/110V input. About DC5V output. Connection Three SMA connectors which are used to connect with antenna (CDMA|/GSM/DCS/CDMA1800/3G). One charging connector. call 438-878-7960