Cell phone jammer has the red light which indicates cell phone jammer is not working

cell phone jammer has the green light which indicates cell phone jammer   is working.
SD card is a Secure Digital Card - Secure Digital card, by the Japanese Matsushita, Toshiba and U.S. SanDISK company in August 1999 made jointly developed. Although the SD card is based on development of MMC card, but still basically two different products, but take into account in the design of compatibility issues, so in most cases, these two products to exchange, is a large capacity, performance, and enhance safety and other features of multi-memory card. MMC card more than a copyright protection signal for data authentication (SDMI specifications). Are used for MP3, digital cameras, electronic books, mini computers, AV equipment. Sizes slightly thicker than MMC card 32mm × 24mm × 2.1mm, capacity will have a large lot, just listing a single card when the SD card capacity of 8MB-64MB range, transmission speed per second, 2MB, but by early 2002 single card capacity has up to 512MB, to enhance data transfer rate to 10MB / s, so that some of the larger file transfer has certain advantages. Also this card is read and write speeds faster than MMC card 4 times, up to 2MB / sec.  cell phone jammer   has the red light which indicates  cell phone jammer   is not working.
At the same time compatible with the MMC card, SD card, MMC card socket support most. From a performance point of view, the two biggest difference is that SD cards emphasize data security, you can set a specific software program or data card to use permissions to prevent users from indiscriminately copying and damage the interests of the owner. Of course, for the average user, this feature useless, on the contrary the system and the encrypted data will occupy 900K memory card capacity, in addition to SD and MMC cards are using an integrated solid media, no moving parts, so nothing to worry about mechanical damage caused by movement of data loss. sd card more rugged, I like Sharp's license is to use the sd card phone. Most digital cameras is now very mainstream. china  cell phone jammer is of the small and light design.
Memory Stick is Sony's launch in 1997, mobile storage, because of its shape like a chewing gum, also known as "chewing gum" storage card. Currently only the Sony for its support. Different from other FlashMemory storage card, Memory Stick standard non-disclosure, required to sign the agreement before use. Memory Stick has a write-protect switch, includes controller, a 10-pin connector for serial data bus, the maximum frequency up to 20MHz, the voltage of 2.7 volts to 3.6 volts, the current average of 45mA.  cell phone jammer   has the on-off button to control  cell phone jammer  .