The Ritz Gear OTG USB Card Reader/Writer is a versatile device that supports various memory card formats including MicroSD, SD, MMC, RS-MMC, and SDHC. With a capacity of more than 20 cards, this card reader/writer is perfect for quickly transferring and reading your data from multiple sources. The device is compatible with universal brands and models, making it a convenient tool for anyone in need of a reliable memory card reader/writer. Additionally, it comes with a manufacturer warranty of 1 year, ensuring high-quality performance for a year to come.