Fits Apple iPhone and select iPod models, Smart-phones with Android based OS Models 
Designed for use with Apple iPhone, iPad and iPod touch and most Android devices (requires iOS 4.0 or later or Android 2.1 or later for wide range use) 
Receive $10 instantly when you activate your Square account (instructions included) 
Pay 2.75% per swipe for Visa, MasterCard, Discover, and American Express 
Swipe $100, see $97.25 in your bank account in one to two business days 
Automatic daily bank deposits 
Plugs into a headphone jack (3.5mm input) 
Square Card Reader and Owner's manual included 
Dimensions 1-3/4" (H) x 9/10" (W) x 1/2" (D)