Modular phones are going to be big news when Google releases its Ara. But Logitech has got in on the action early with its case+ that lets users change backs using magnetic mounts.

Logitech's case+ will fit the iPhone 5 and iPhone 5S adding a basic case and magnetic rear plate. This system will then be upgradable using extras like power, car mount, kickstand and wallet modules.

READ: Google's Project Ara modular smartphone: Everything you need to know 

Logitech will be releasing the case+ as a bundle with all four attachments included. The basic unit is a case with a magnetic plate that doubles as extra protection.

Included there's a 2,300mAh battery called +energy, a magnetic mounting system called +tilt, a car mount called +drive, and a card, cash and key holder called +wallet. The "Magnashield" technology means the magnetic strips of cards won't be affected, nor will the phone itself.

Logitech has the case+ available for pre-order now for $200 and should be shipped later this month. We've contacted Logitech about UK availability and will update this story when we hear back.

modular iphone case from logitech lets users upgrade using magnetic add ons image 2