Compatability checker:

Each R4 SDHC device comes with the following components: 

1 x R4 SDHC DS Card(slot 1)

1 x 4GB Micro SD Card

1 x Micro SD USB card reader

This is the third generation r4 card that was designed for the needs of users who required higher memory card capacity. This again is a very popular selling r4 cartridge for use with the DS and DS Lite only but the main advantage over the R4 DS V2 card is that this DS card accepts up to 32GB micro SD card compared to that of a 2GB for the standard R4 DS. It’s not suitable for DSi. This device is made by the leading R4 card manufacturer therefore ensuring quality build and reliability. This is a must for serious users of the DS or the DS Lite consoles as it allows 16 times as much files to be saved on the memory card that a 2GB memory card. The device is a slot 1 functioning peripheral that includes a 4GB micro SD card in order to function(included in this package). The memory allows this device to have storage capacity of up to 32GB(max possible with this R4 SDHC card) 

The main advantages of this devices are as follows:

Cheap and reliable device

Big storage capacity with 4GB memory card

Play homebrew games

Easy to setup using drag and drop facility

Good build quality

Allows playing of music, videos and eBooks(media heaven!)via your console

Summary:

All in all this device is best suited for individuals who do not want to be changing files again and again on the memory card as the R4 adaptors capacity for memory is a massive 32GB and therefore it can store a lot of data, if combined with a memory card of this size. Great device that will certainly appeal to owners of slightly older consoles.