RS-MMC (Reduced-Size Multi Media Card) - definition

RS-MMC is a removable media storage card which was sued in so many old mobile devices. It is like every other flash storage, different types of documents (i.e.: audio, video, documents etc.) can be stored inside the card. It has two voltage input variable which are 3V and 1.8V. In old RS-MMC cards 3V was used to power up the chip, nowadays few RS-MMCs are found which can be brought in active status using only 1.8V or both.
MMC (Multi Media cards) are called Dual-Voltage RS-MMC card.