These are very high powered pocket sized cell phone jammers that will disable all cell phones in all countries including the new 3G band. Two models are available, the extra high powered CTS-1000HG 2400Mw. They can be used discreetly whilst in a pocket or bag e. T. C. For covert use and have an effective range of up to 30 metres which is ideal for a large room, restaurant, cinema e. T. C. Or whilst having a conversation and you want to eliminate others from using mobile telephones. They come complete with built in Ni MH battery and charger and will work with all cell phones in all countries. The CTS-1000HG range are really the most sophisticated hand held cell phone jammers in the world, housed in a rigid aluminum anodized case with gold plated antenna connections for excellent performance and come complete with dual voltage 110V / 240V charger.