Trident Case AMS Exo Series Case for Samsung Galaxy S3 - Retail Packaging - Black Perseus A.M.S. is required in order for the Kraken A.M.S. Exoskeleton to transform into a Kraken A.M.S. case. Kraken A.M.S. Exoskeleton is not a standalone case. Kraken A.M.S. Exoskeleton features hardened polycarbonate, providing a stylish and rugged surface for maximum protection. This case Series protects device power-ports and audio-jacks with silicone plugs to keep out dirt and debris, and the self-applicable screen protector provides reliable screen protection. Kraken A.M.S. Exoskeleton includes a lanyard loop, which allows you to accessorize your phone with key chains, charms or other accessories. The built-in media stand allows convenient and hands free viewing from multiple angles.