The ACM1252U-Z2 is a small 13.56Mhz contactless reader module measuring only 52x20x6mm primarily focused on NFC applications. It allows easy integration into a third party embedded system. It has support for ISO14443A/B and ISO18092-compliant tags. When multiple cards are presented it has an anti collision feature to ensure only one card is read at a time. The ACM1252U-Z2 is compliant with PC/SC and CCID through its USB 2.0 full speed interface. Weighing only 3.65g its perfect for integration into small devices and the bonus is that as the reader module is firmware upgradeable to allow more flexibility in the future. It can be used with a detachable micro-USB cable that allows it flexibility to be located far from the USB host interface.Please check the datasheet attached for more information.