①. M5Stack RFID2 Unit Chip | Enhanced RFID Capabilities: Powered by the WS1850S chip, RFID2 supports reading, writing, recognition, and authorization of RF cards, operating at 13.56MHz for contactless data exchange. ②. Fast and Efficient Communication: Supports I2C data rates of up to 3400 Kbit/s in high-speed mode, ensuring rapid data transfer and improved system responsiveness. ③. Multiple Protocol Support: Compatible with ISO14443A, MIFARE, and NTAG protocols, suitable for various RFID applications. ④. Compact and Durable Design: Measuring just 48x24x8mm with compatible holes, RFID2 is compact yet durable, designed for integration into smart devices and systems. ⑤. Wide Range of Applications: Applicable for smart home access control, vehicle management, smart transportation, and smart bookshelf, designed to meet diverse verification needs with reliable performance. ⑥. Operating frequency: 13.56 MHz ⑦. I2C data rate: Fast mode: up to 400 Kbit/s; High-speed mode: up to 3400 Kbit/s ⑧. Receiver buffer: 64 bytes ⑨. Supported protocols: ISO14443A, MIFARE and NTAG ⑩. Working temperature: -20-85°C ⑪. Data storage: Greater than 10 years ⑫. Reading distance: Less than 20 mm ⑬. Development platform: for Arduino, UIFlow (Blockly, Python) ⑭. 2x LEGO compatible holes ⑮. Applications: Smart home access control system, Vehicle management, Smart transportation, Smart bookshelf ⑯. Note: Installation guide not included, it is recommended to seek professional installation. Please check as much as possible to make sure the item is what you need. The product may be updated constantly; due to different batches, the actual product may have slight differences or color differences, which does not affect use. ⑰. Colour: Photo Color ⑱. Material: ABS ⑲. Package Contents: 1x RFID Unit. Only the above package content, other products are not included.