3G GSM CDMA Mobile Cellular Phone Jammer 4 Antenna - Silver Cellular Phone Jammer is the device used to block the signals of cell phones where mobiles are prevented. Basically dell phones are prohibited in a region for the sake of security, to maintain silence and for some other protocol reasons. These jammers prevent the signals of cell phones in a limited range. The Cell Phone Jammer uses high frequency and low power interference technology that makes it highly proficient. Guruji Mart deals with such security devices at an affordable rate. It helps in reducing crime from our society through these security devices. • Semi-diameter of interception: Up to 20 • Output power: 80W • Energy Consumption: 250W • Power Supply: AC110-220V± 10% / DC5V 45-55Hz Note: The jamming distances we mentioned on website are for customer's reference only. The actual jamming distance will be varied depending on the signal strength and the use location and if full charges, etc.