R4i SDHC DSi Card for Nintendo DSi Red Box,Official website: www.r4i-sdhc.com The R4i SDHC DSi Card(Red Box) is the latest development in flash cartridge technology for the Nintendo DSi. The R4i is an adapter so you can use a microSDHC card (up to 32GB) with your Nintendo DSi this allows you to store much more and allows you to benefit from all the following features: Watch movies Play music Browse pictures Read E-Books and more.