Square Reader for magstripe (with headset jack) is a simple, easy-to-use device that plugs into the audio jack of your smartphone or mobile device. With this device, you can accept all major credit and debit cards for one low rate. There are no hidden fees - you'll pay just 2.6% + $0.10 per swipe. You can also use the free Square Point of Sale app to track your earnings and view your complete sales history. The app is available for both Apple and Android devices. The Square Reader for magstripe is a great solution for small businesses, entrepreneurs, and anyone who needs an easy, affordable way to accept credit and debit card payments.