Square Reader : contactless & chip (1st generation) A simple way to accept contactless cards, Apple Pay, and chip cards, at your counter or on the go. Compatible software: -Square Point of Sale -Square for Restaurants -Square for Retail -Square Appointments Square Reader for contactless and chip (1st generation) has a micro USB charging port and the power button is to the left of the port. *S103 : This is a 1st Generation - Version 2