China cell phone jammer has the built-in design

Note that: 1. This method is not only suitable for large file transfers, such as 4 - 5 MB mp3 file. (2) can not continuously transfer more files, to prevent memory overflow 3 remaining phone memory to have the appropriate memory space. The method is only a stopgap measure, not the way to approach, but there is no better way and in the case of hardware, occasionally, be a choice. Bluetooth is RF (2.4GHZ) carrier, so it has the basic characteristics of electromagnetic waves, have a greater power, can increase the transmission distance, angle and direction and there is no limit, with the wall of, in between objects reflection, mirror set, diffraction. Bluetooth is mainly used for short distance transmission (up to 10 meters) data and voice (1Mbps), power consumption is very low, and can connect many devices, the transmission speed. china  cell phone jammer has the built-in design.
Bluetooth high cost; RF technology susceptible to frequency interference; wall features protection for data security configuration issue; Bluetooth rather late, there is no clear, uniform standard, compatibility issues not yet resolved. Bluetooth is a short-range wireless data transmission, now frequently used mobile wireless data transmission in the infrared as well. Infrared interface is the standard configuration of a new generation of mobile phones, it supports the phone and computer and other digital equipment for data exchange. Infrared communication has a low-cost, easy connection, easy to use and compact structure, so in small mobile devices access to a wide range of applications. Via infrared interface, various types of mobile devices can freely exchange data.   cell phone jammer  has the function of nonstop working.
Infrared is the wavelength of electromagnetic waves between 750nm to 1mm, which is higher than microwaves but lower than the frequency of visible light, is a human eye can not see the light. As the shorter infrared wavelengths, the diffraction barrier ability is poor, so more suitable for applications that require short-range wireless communications applications, for point to point data transmission line, transmission rates up to 16Mbps. Infrared Data Association (IRDA) data communication using the infrared wavelength range of 850nm to 900nm limited within. The leather cover will make cell phone jammer  more convenient to carry.