Square is about to face even more competition in the mobile card reader space with the launch of Amazon’s new Local Register. Amazon’s credit card reader works in a similar way to Square, plugging into the headphone jack of mobile devices like smartphones and tablets to read card details and allow small businesses to process payments they’d usually take only in cash. Amazon is making its card reader available for $10, and it will work on iOS, Android, and Kindle Fire devices. Amazon’s Local Register also undercuts both Square and PayPal for mobile payments, fixing a fee of 1.75 percent per swipe payment until December 31st, 2015 for those who sign-up before October 31st.