It should be done before using cell phone jammer

 SanDisk Corporation jointly developed in August 1999.
Therefore somewhat difficult to distinguish from the appearance, the following, I will introduce the common market, the SanDisk brand SD card of true and false identification. First, look at the memory card, sandisk genuine memory card with a laser to change the color label on the front paste, different angles will have a laser color changes. Followed by domestic agents licensed authentic card, similar to the above form of packaging of the plastic package, but the lower right of the words "five-year guarantee" and Japanese are replaced by the graphics show that the five-year warranty. Also, from the bottom of the SD card is a gap to the most simple identification, origin above the number of genuine SanDisk card SD card back is the only authenticity, and through the 800 telephone inquiries. It should be done before using cell phone jammer .
But said the inquiry system is not yet ready. SD cards currently on the market a lot of brands, such as: SANDISK, Kingmax, Panasonic and Kingston. SANDISK capacity of SD card is the most common market, divided into high and low speed SD card. Kingmax SD card, using a unique integrated packaging technology (PIP), making the fraud difficult to imitate, Kingmax is the SD card maximum transfer rate of 10MB  s, with a waterproof, shock resistance, anti-pressure-proof design, it can meet the field to shoot a variety of requirements. Panasonic SD card, as the founder of the SD standard, its technology can be said that one of the best SD card in the market.
Greater the power of the laser light intensity, the greater the more the laser light. Commonly used in the teaching of the laser pointer laser power is 1mW and 5mW, respectively, in Europe and U.S. standards. Now the market can often be seen 10mw, 30mw, 50mw, 100mw or 200mw green light pen, these are special-purpose laser pointer into the market, there are security risks. Class II and Class III laser laser pointer to explain what a professional? Class II output power of 1 mW laser products. Will not burn the skin, does not cause a fire. As the eye reflex can prevent some eye damage, so these are not considered dangerous laser optical devices. (For example, when the eye encounters a bright light, it will automatically blink, or turn the head to avoid the strong light. This is called reflex action or reflex time.Therefore, the low divergence of the laser in the long-range destruction on a decisive advantage. In general, when light-emitting area of the same, the longer the wavelength, the greater the divergence angle. Distance is not more than 7 meters from electromagnetic interference, the advantages of infrared products is the product of low cost, cheap.