The Nintendo 3DS StreetPass is an “always on” background connectivity system that allows users to share multiple software contents with each other.

So what it does is it constantly searches for other 3DS systems in the background when you are connected to Wi-Fi. When both systems are close enough, they will be buzzed and you can do whatever the game has in store for this feature. Super Street Fighter IV for the 3DS makes use of this StreetPass by allowing players to easily search for players to battle on the go.

I’m not sure how much battery does StreetPass uses, but if you want to maximize power conservation you can turn it off in the settings. People have reported that when the 3DS is fully turned on (e.g. 3D screen, Wi-Fi, brightness, sound, etc), it will last around 3-5 hours with the 3D screen consuming the most power.

The StreetPass is definitely a feature that caters mostly to the Japanese audience, however it may do well in other big countries as well. I wonder how many 3DS owners in Singapore will be making use of it >.<. Well, we will find out soon enough as the 3DS will be available for the rest of the world in the next two weeks.

Source(s): Kotaku