I've been looking around for 3DS info and so many people are like "omg you have to keep it so close for it to work, thats crazy" 10-14 inches is a regular distance for portable phones/game consoles. If you play a DS, generally you hold it in front of you with your arms bent at about 90 degrees. This is about 1 foot. Atleast for me it is. Unless you play portables with your arms straight out away from you, you'll be fine.