Circuit electrinic

 1900~1990MHz is also contained in the working frequency of cell phone jammer .
Brand and customer base better. Earlier from the Chinese network is one of the manufacturers to enter online, through continuous development, has formed a good brand and user base. As of the end of March 2009, page views from the Chinese network has reached 300 million times / day. In addition, from the Chinese networks literature as a grand site, as Shanda comprehensive line of wireless entertainment business, one in human resources, product integration operations (such as the original literature into online games, etc.) also has a large advantage . Chinese online (www.ChineseAll.com) was established in 2000 at Tsinghua University, is one of Chinas Internet publishing pioneer, leading to the most legitimate digital content broadcaster. At present, the Chinese online products or services related to educational institutions, government agencies, public consumption, in various market development in a leading position.
Chinese online product content, copyright and other aspects of operations and customer base are more advantages, mainly in the following points: rich, extensive resources: Chinese online digital rights in China earlier one operating company, has accumulated a rich content resources, in addition to the Internet with the original literature, but also a broad range of primary and secondary education for users, courseware and other content resources, and have literature classes, art classes, childrens class, economics and management, integrated classes, education classes, lifestyle, tools and other literary works. This type of cell phone jammer can work as long as the antenna is collectively connected and the power supply is switched on.
Resources are more extensive content partners: Chinese online now with publishers, writers, original site, the book established the upper range of content partnerships, at present, with more than 400 publishers, more than 8,000 well-known writer, mo re than 20,000 Web authors to cooperate. On the Internet, wireless Internet has a wealth of content operations experience, reading the users structure, needs, content management and control have a deep understanding. Operating experience and extensive collaboration with government departments: Currently, the Chinese already have Monternet online, mobile own business experience of cooperation, the Chinese telecom operators have a wealth of management experience working system.

The antenna determines the shielding range of cellular phone jammer. 
Should implement prevention unit is responsible, focused, ensuring safety "approach, in accordance with the principle of" who is in charge, who is responsible for the development of safe production responsibility system. Security work into the performance appraisal. A month to conduct a safety check, make a record, identify problems and timely rectification. Check the results and linked to the income of employees, through the specification and inspection to ensure the implementation of various rules and regulations. Pre-job of the salesperson, business training, security, confidentiality, and legal education, and pass the examination can be employed. To develop a cell phone store receipts, cash-carrying on the way the anti-robbery prevention and emergency response plans, and the familiar, once the incidence, rapid and effective processing solutions. The direction of cell phone jammer is decided by the antenna.
Security facility configuration, capital safety, electrical safety, fire safety management with reference to the business hall of Jiangsu Mobile Communication Co., Ltd. safety regulations "file execution. The information security manager responsible for the confidentiality of sales information: information security education on a regular basis, and stores the information security implementation of the supervision and inspection. For all types of business documents, internal company documents, work information, technical data and statistical analysis data, non-license led by the higher authorities, all employees shall not be privately available to any individual or entity shall not be privately copied, disk copy, or network transmission other ways out of the workplace. Systems Engineering in the case of stores people personnel changes, job transfers and permission to adjust the situation. The antenna and battery of cell phone jammer are the built in type.
The store manager shall promptly submit an application to the higher authorities, with the completion of work the application, close, permission to adjust the work in accordance with the requirements of the higher authorities. Business accepted members in their daily work involved in customers personal data, cost information, call list information must be kept strictly confidential and shall not be divulged. Customer data to strict management, the timely entry of the BOSS system. The raw data shall be properly kept on time and returned to the company. Place of business must be set within the computer power-on password may not be equipped with floppy drive must be disconnected from the network after work. Business computer, the timely replacement of the BOSS job number passwords should be based on the requirements of the higher authorities.

In recent years, car MP3 formed a fashion trend among the car owners, whether to buy a tape or CD disc at the past, there are the stored information. While you can download any music through the network needs to MP3, so MP3 become the cheapest and most convenient way to exchange music. Recently car, the MP3 car digital products is the highest sales growth in the auto parts market this year. But many products that is not good enough hurt the interests of consumers in the market.
It is understood that the last car audio market share of 80% dominated by the car CD discs, and 20% for the low-end car cassette machines occupied. Beginning last year, car MP3 owners are more and more popular, and gradually become the main alternative to car audio CD player. Comparing with CD ROM, the car MP3 can be unlimited downloads from the Internet the latest pop music, hence, have low cost, content and flexible, easy to update, and many other advantages.
According to the survey, car MP3 market is growing rapidly, but there has also been the phenomenon of cohabitation of product quality. Some manufacturers low price to win, resulting in uneven quality.
How to safeguard the interests of consumers and make the car MP3 healthy market development in the current chaotic car MP3 market situation? Industry believes that the functions of management and marketing managers should increase market management, prevent inferior products entering the market to regulate market and promote the healthy development the market. Meanwhile, in order to protect their own interests, consumers should shop around different car MP3 store.

This is very simple circuit.Here according to the sound you can see the LED is also blinking.Beginners can test this circuit and try to make new thing by using this circuit.That is my will....