Any brand CF Card will do. The LR Unit will store 50 images on it's internal memory with NO card installed. However, I prefer to have 2 CF cards and simply switch them when I check the unit. I check mine often enough I also don't need a huge memory capacity but some may desire something along the lines of a 256MBs if they were going to be using the Video clips feature. I seen in the holiday sale adds today in the paper that our local Staples store has 256MB CF cards on sale for only $14. They normally go for about $40. Don't forget to buy the MasterLock Python for it! This lock is a MUST HAVE for the Leaf River Units! With the money you save you can buy the lock and a CF Card or two.