CardNinja can store up to 8 cards AND cash using a durable elastic fabric (driver's license, gym card, train pass);Using 3M adhesive, CardNinja securely attaches to the back of your device. It removes cleanly too!;Compatible with the following smartphones: iPhone 7 / 7 Plus / 6 / 6 Plus / 5 / 5s / 5c / 4 / 4s, Samsung Galaxy S6 / S5 / S4 / S3, Galaxy Note 5 / 4 / 3 / 2 / 1, LG G3 / G2 / Optimus series, Nexus 6 / 5 / 4, HTC M8 / EVO / Desire / Sense, iPod Touch, Sony Xperia and much more! Works with nearly ANY phone case including: Otterbox, Lifeproof, CaseMate, Belkin, Speck, Apple and more;Reviewed by the biggest names in tech: CNET, The New York Times, Macworld, USA Today, The Wall Street Journal, The Next Web, and Cult of Mac;The Original! CardNinja (by cubi) is the world's first PATENTED adhesive smartphone wallet. Designed in California;60-day worry free guarantee. 100% USA based customer support