To achieve these capabilities, the Bluetooth software architecture will leverage existing specifications such as OBEX, vCard / vCalendar, HID (Human Interface Device) and TCP / IP, etc., rather than go to the development of new norms. Equipment compatibility requirements to meet the Bluetooth specification and the existing agreements. Using Bluetooth wireless transmission of data is convenient and stable characteristics, but the speed can not be with the reader, data lines compared, only better than infrared. According to my tests, using Bluetooth to the original card to write data per second, up to 37k. The compatibility of the mmc card to write data, the different card speeds vary, but are not the original card is fast.   Cellular Phone Jammer  can block the cell phone band or GPS band simultaneously.
I kingmax card with Bluetooth data is written to him only 26k per second look. That is the original card and my kingmax card gap between the 10k, this is not a small gap, ah, how to enhance the speed of Bluetooth, to make up for this gap? Changing the card, for Bluetooth are unrealistic, but there is no good way to optimize the compatibility of the mmc card. Do not approach it? Is a last resort, when a thought suddenly flew from the front, right. Using Bluetooth to the phone memory to write data, as long as the original file is not greater than the remaining space for mobile phone, it is feasible and should in theory speed faster than the original card to write ah, went ahead, I immediately chose a mp3 file Write to the root directory of the memory (write to the root directory, after finishing the phone beeps to let you dump in, otherwise you will not be prompted to dump.), wow! Per second to 41k, Terrific ah, faster than the original card. Other data transfer is complete, it emits a loud tone, suggesting that you dump. Then you can choose to save the mmc card in the location of the memory dump to the mmc fast, a few seconds to complete.   cell phone jammer  has the good cooling system with wind slots in both sides.
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.   mobile 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.