The OtterBox Waterproof Case 3000 is the perfect size for GPS units, cell phones, PSPs®, satellite pocket mail units, handheld PCs, and more! It has the patented ability to keep its contents completely dry even when submerged in water up to 100 feet below the surface. Great for worry-free storage of your valuables when youre boating, fishing, on beach trips, or during any activity that involves water, inclement weather, or rough conditions.