It means that the shielding range of mobile phone jammer

It means that the shielding range of mobile phone jammer can be adjusted.
CompactFlash Type II cards can not be used on the Type I card slot. The LEXAR company has introduced up to a 4GB CF card. This is the only stamp-sized portable memory card. MMC is available is used to store pictures, video or text data, and the ability to easily pluggable adapter between Pocket PC and desktop. MMC card and SD card is very similar to the difference between the two is that the MMC card is the lack of SD card with write protection switch. And the thickness of slightly different, and some models support both mmc and sd card, the card is more common, more widely used in Nokia phones, we are no strangers. By operating the button on the host of mobile phone jammer .
SD Card Secure Digital Card - Secure Digital card, developed by Japan's Panasonic, Toshiba, and the United States SanDISK in August 1999, jointly developed by SD card is developed according to the MMC card, but basically the two different products, but has been designed with compatibility issues, so the two products can be interchanged in most cases, is a large-capacity, performance, and enhance safety and other characteristics of the multi-function memory card. Than an MMC card data copyright protection cipher authentication function (SDMI specifications). Is used for MP3, digital cameras, electronic books, mini-computers, AV equipment. For example, when the customer just wants to jam the cell phone signal by mobile phone jammer .
The host of mobile phone jammer can not work normally
Than the MMC card, the size of the size a little bit thicker 32mm × 24mm × 2.1mm, capacity will have a lot of the capacity of the SD card just listed a single card 8MB-64MB range, the transmission speed per second 2MB to early 2002, a single card capacity of up to 512MB, the data transfer rate is also upgraded to 10MB / s, and so have certain advantages in the transfer of large files. Another card read and write speeds than the MMC card to four times faster, up to 2MB / s. At the same time compatible with the MMC card, SD card socket mostly support the MMC card. From a performance point of view, the two biggest difference is that the SD card emphasis on data security, you can set the permission of the program or data card through a specific software in order to avoid wanton copy, damage the interests of the owners.