On the back side of the phone case, there's a slot that allow you to attach add-ons like a super compact speaker, Square reader or additional memory. The full line also includes things like Olloclip lenses, a Seek Thermal camera, tripods and more that can all be used without having to take you phone out of the main case. Otterbox's Universe system is available May 29th for iPhone 6/6s and iPhone 6 Plus/6s Plus with the case itself priced at $50. There's a collection of 15 accessories that work with the case that are available at launch, except for the Goal Zero battery which will arrive in June. Here's the full list and pricing info:

Square contactless and chip card reader: $50

Olloclip 4-in-1 lens: $80, includes fisheye, wide-angle, 10x and 15x zoom options

SanDisk iXpand Flash Drive: $60-$120, available in 32GB, 64GB and 128GB capacities

Nite Ize Steelie vent mount kit: $40

Goal Zero slide battery: $55 (6/6s) and $60 (6 Plus/6s Plus), adds a full charge to your iPhone

Manatee Works StingRay barcode scanner: $95

Seek Thermal compact camera and case: starting at $249

Influx WiFi booster: $40

PolarPro Trippler tripod: $50

PolarPro Stance compact tripod: $30

PolarPro PowerPack removable battery pack: $50

PolarPro Beat Pulsar wireless mobile speaker: $60

PolarPro Fisheye wide-angle lens: $30

PolarPro Trail Blazer armband: $35

PolarPro Stash Slim mobile wallet: $20, stores cards on the back of the case