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When there are too many cell phone noisy around you, you may wonder what to do to bring peace to your location. The answer is cell phone signal jammer. There are many location where cell phones have a tendency to create a nuisance. These kinds of locations including the following: library, church, board meeting, restaurant, public transport, religious place, cinemas, conference room, concert and so on. In those places, cell phones are not welcome. While cell phones are certainly a great convenience, they can also be a terrible nuisance to other patrons that are disturbed by the constant chatter taking place on the phone. What to do to stop the use of cell phones? Whether you want to prevent the annoyance of incoming calls, or you want to stop people from talking incessantly on their phones around you, using a cell phone blocking device is an effective method for maintaining the quiet you desir. That is cell phone jammer, also called mobile phone signal jammer. Similarly, some customers hold up lines as they try to complete their conversations. With cell phone jammer, this doesn’t have to be a problem! While a select few of your customers may be unhappy with blocked calls, the vast majority will be thrilled that the persistent cell phone chatter that has interrupted their experience has finally been put to an end. Before you buy a cell phone jammer, please make sure that you will use it in the necessary locations only. Also, please make sure it won't break the law of your country.

We are surrounded by cell phone now. Sometimes, we go into a restaurant and want to enjoy a meal or coffee and quietly read, there are always someone begins talking loudly on their cell phone. In the other public places also have the same situation. It's almost impossible to catch a movie without having the experience interrupted by the sound of a cell phone ringing. The situation is getting worse with more than 200 million cell phones worldwide and growing. To get back to our peaceful lives, a backlash against the cellular nuisance has already begun. One of the ways is to install a cell phone jammer. In fact, many governments across the world are now considering imposing etiquette on mobile gabbers in public spaces by legalizing technology that blocks cellular signals. Cell phone jammers, most of which cost less than USD1000, have been around since 1998. It can block signals in a room about the size of a movie theater. The mobile phone jammer sends out a low-power, encoded radio signal or modulated radio wave. Jammers work in one of two ways. Some devices set their signal to the same frequency as pagers and mobile phones, cutting off communication between handsets and base stations. Others work as electronic filters that fool mobile phones into thinking there are no frequencies available to make or receive calls. Manufacturers of the devices say the jamming only affects the designated area (most radii are a couple dozen to several hundred feet) and works only on cellular transmissions. Sounds like the perfect solution to pesky phones, right? The problem is, cell phone signal jammer remain illegal in many countries. The tide, however, may be changing. This past spring, both Hong Kong and Canada announced they would consider legalizing jammers in an effort to curb bad phone behavior in public. Around the same time, the leaders of India's parliament revealed they had already installed the devices to avoid interruptions during sessions. Here is a great mobile phone jammer, the 4 Band 20 Meters Portable GPS Cell Phone Signal Jammer, model number S805047. This product can be used in any place where mobile phones and GPS are prohibited to be used! Cover interface standards: Cell phone signal (CDMA, GSM, DCS, 3G), GPS (1570-1580MHz) Total output power: 4W Effective range: Radius Up to 20 Meters. Work time: 90 minutes, this jammer can continue to work when charging, Support being powered by charger or car cigarette charger. Every band frequency can select output power. All the TX frequencies cover downlink only. Technical Specification Radius range: 2-20M depending on the mobile service provider's network condition Europe and Middle East Market -GPS: 1570-1580 MHz -GSM900: 925-960 MHz -GSM1800: 1805-1880 MHz -3G: 2110-2170 MHz American and Asia Market -GPS: 1570 - 1580 MHz -CDMA GSM: 850-960 MHz -DCS PHS: 1805-1990 MHz -3G: 2110-2170MHz Temperature: -10℃ to +50℃ Humidity: 5% to 80% Power supply: AC100-240V/DC12V Continue using time:Around 90 minutesWeight: 0.4KG/PCS Weight: 0.4KG/PCS Dimension: (W*H*L): 32*112*62mm (not include antennas.) Product Notes 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