The ACR900-A1 is a new handheld EMV terminal from ACS designed for taking payment. It has good connectivity options such as WIFI, GPRS and 3G making it simple to connect to the back-end. It uses a 32-bit secure processor running Embedded Secure Linux®, 512MB Flash and 256MG RAM. It features a built-in printer and an additional SD card to expand upon its 32GB of memory. Its a good choice for a variety of payment applications as its lightweight, compact and easy to carry. Both Contact and Contactless interfaces of the ACR900-A1are supported with ISO14443 A/B 1-4, and ISO7816 1-3 ClassA/B/C supporting T=0 and T-1.