Great deal and they really do appear to be 100% authentic. It even comes with a plastic sleeve for two cards. Definitely 3.3v and works fantastic with Yamaha QY series portable synths (just in case what you buy them for). Remember: ALWAYS format smartmedia cards on the DEVICE you are using. To use them, never use a PC as this may damage the card. (This is a known issue for all SmartMedia cards as well as many other formats such as SD, CF, etc.). It's just a good rule of thumb to always FORMAT from the device (note that adding and deleting files from the PC is fine, just don't format cards this way unless recommended by the manufacturer) .
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