The ACS ACR1252U-M1 is a contactless smart card reader connected to the PC via USB, developed on 13.56 MHz technology and certified by the NFC Forum . It is the advanced successor of the ACR122U series, designed to offer greater security and versatility thanks to the integrated SAM (Secure Access Module) slot, which allows keys diversification and mutual authentication for ultra-secure transactions. This device is a real "3-in-1" tool capable of operating in all NFC modes: Reader/Writer , Emulation Card and Peer-to-Peer (P2P) . Thanks to compliance with CCID and PC/SC standards, it is a plug-and-play device compatible with the main operating systems, ideal for e-Government, e-Payment, access control and marketing via smart poster. Technical Specifications: ACS (Advanced Card Systems) Model : ACR1252U-M1 Interface : USB 2.0 Full Speed (12 Mbps) Operating Frequency : 13.56 MHz Speed Reading/Write : Up to 424 kbps Operating Distance : Up to 50 mm (depending on the type of tag) Support Standard Contactless