cell phone jammer can shield external communication of the participants

The SD card is Toshiba's encryption technology hardware from the MMC card technology, the MMC card may be easier to allow users to copy digital music, Toshiba will add these techniques to the hope that the music industry as a peace of mind. Similar technology, including Sony's MagicGate, theoretically encryption technology for the introduction of digital rights management measures, but the functionality is rarely applied. Users can use a USB card reader, use an SD card on the PC. Some new computers have built-in card reader device. The latest development is that SD has built-in USB port, omit the reader. SanDisk's design is to use a collapsible sheath to protect the USB port. After the battery of  cell phone jammer is fully charged.
The Kingmax production of SD card is not write-protect switch. The Company believes that this switch is too easy to damage. It is produced by the thickness of the SD card and MMC card the same as 1.4 mm. Open standard memory card format SD card also has a large number of patents and registration of trademark protection, and authorized only by the Secure Digital Alliance. Secure Digital Alliance license agreement does not allow open-source SD driver, this situation has generated a lot of controversy about open source and free software. The common practice is to develop an open source shell, but the core is closed source SD driver for a specific platform, open standards for this practice and expectations are too different. Another common practice is to use the older MMC mode. Next, the paint cell phone jammer will be presented.
10.Process chart of cell phone jammer system
Flexible use of magnetic sealing gasket.Unless very high shielding where required, or does not need to be continuous in the gap using electromagnetic gasket. In practice, according to the requirements of shielding effectiveness of liner installation intervals, each gasket leak between the small holes in front of the formula can be used.cell phone jammer can shield external communication of the participants in the meeting room. In the prototype liner carefully adjust the interval, so that both meet the shielding requirements, but also the lowest cost. For civilian products, the interval between the liner can be λ/20 ~ λ/100 between. Military products are generally continuous installation.10 Selection of electromagnetic gasket
Any parallel with the conductivity and elasticity of the material can be used as a magnetic sealing gasket. Therefore, the market can see many kinds of electromagnetic gasket. The electromagnetic characteristics of each sealing gasket, suitable for different applications. Designers should be familiar with the characteristics of a variety of electromagnetic gasket, flexible choice in the design, to meet product performance requirements, improve product reliability, reduce product costs. The tranquility inside cinema, recording room or performance hall can be kept by cell phone jammer. Select the magnetic sealing gasket to consider several key factors: shielding effectiveness, environmental adaptability, ease of installation, electrical stability.