RS-MMC, Reduced Size MultiMediaCard, was introduced in 2003 by the MultiMediaCard Association (MMCA) as the second form factor memory card in the MultiMediaCard family. The RS-MMC is a smaller version of the standard MMC card, approximately half in size, and was specifically designed to be used by mobile phones and other small portable devices.




In 2005 the Dual Voltage (DV) RS-MMC was introduced. It is basically the same card like the standard RS-MMC but operates with dual voltage, 1.8V and 3.3V, leading to lower power consumption which contributes to longer lasting battery life for the host devices. The DV RS-MMC and the RS-MMC are completely compatible with each other but since some mobile phones, mostly from Nokia, only operate with 1.8V cards the regular RS-MMC will not work. We recommend to always buy the Dual Voltage RS-MMC for being sure your memory card will function with the electronic device.

Later in 2005 the MMCmobile was introduced which is a further development of the DV RS-MMC that offers much faster data transfer speed. The MMCmobile has today the highest, up to 52 MB/sec, theoretical data transfer speed in the whole memory card industry. It is about 20 times faster than the regular RS-MMC.




The MMCmobile will also be available with the secureMMC application, copyright protection technology, by the end of 2005. The RS-MMC, DV RS-MMC and MMCmobile memory cards always come with a MMC or MMCplus adaptor. This makes them not only compatible to all MMC and MMCplus slots but also to all SD Memory Card slots. It is important to keep in mind that music stored on MultiMediaCards my not be able to play back when inserted into a SD Memory Card slot due to the copyright protection features supported by the SD slots.