If you want to get where you're going, you need to know where you are, and what direction you're facing. For eons humans have been able to figure out which direction is North simply by looking at the direction of the sun's travel, or by locating the appropriate stars.
The North Sense is a cybernetic body enhancement designed to incorporate a precise sense of magnetic north directly into your body, for some reason. It consists of a small vibrator like you'd find in a cellphone, which is coupled with some simple directional circuitry and a pair of piercing barbels like you'd regularly find stuck in a nipple.
The North Sense is expected to sell for less than $350.00, which seems about as reasonable as any other aspect of this weird project.