The ACR120 Contactless Smart Card Reader is a compact and cost-effective smart card contactless reader and writer. Developed based on the 13.56 MHz contactless (RFID) technology, it supports Mifare® and ISO 14443 A and B cards. ACR120 has a proximity operating distance of up to 5 cm, depending on the type of contactless tag in use. The versatile reader is also available in module form, as well as in both USB and Serial interfaces, allowing the device to be easily integrated into the PC environment and other systems. The compact design of ACR120 makes installation quick and handy in any location, making it an ideal tool for a broad range of applications, including public transport terminal, physical and logical access control, and even vending machines. ACR120/ACR1281U-C8 Standard Features USB PnP or serial RS232 interface (Also available in RS485 upon request) Read and write functionality Built-in antenna for contactless tag access, with card reading distance of up to 50 mm Supports major contactless smart cards conforming to ISO 14443 Type A and B in the market Built-in anti-collision feature (only 1 card is accessed at any time) Selective card polling capability (especially useful when multiple cards are presented) Operation LED Buzzer OEM PCBA module version (Upon request)