Features: Brand new and high quality This is for RaspberryPi NFCHAT based on PN532 operating in the 13.56MHz frequency ranges. Near Field Communication is a wireless technology that allows point-to-point data communication between devices within a short distance of 10cm. It is widely used in applications such as access control system, meal cards, etc. It supports three communication interfaces: I2C, SPI, and UART, configured via switches Onboards standard for RaspberryPi 40PIN GPIO extension header, supports for RaspberryPi series boards Reserving breakout control pins, for easily connecting with host boards like STM32Arduino Onboards PN532 chip, supports various NFCRFID cards like MIFARENTAG2xx, etc. Based on the popular NFCcontroller PN532 with multi-interfaces option, this HAT will easily enable function for your for RaspberryPi. Specifications: Material:Plastic NFCcontroller: PN532 Operating voltage: 3.3V/5V Operating frequency: 13.56MHz Communication interfaces: I2C, SPI, UART (default) Default baudrate: 115200bps Size:Approx.85x56mm/3.35x2.2inch Package Includes: 1 Set Wireless Communication Hat note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.