RFID2 is a radio frequency identification unit with a built-in WS1850S chip and a working frequency of 13.56MHz. It supports multiple functions such as card reading, card writing, recognition, recording, encoding and authorization of cards. Using magnetic field induction technology, non-contact two-way information exchange is achieved, and the information of the induction card is read and . It can be used in application scenarios that require information verification, such as access control systems, check-in systems, warehouse goods storage, and community vehicle entry and exit registration Working frequency: 13.56 MHz I2C data rate: Fast mode: up to 400 Kbit/s; High speed mode: up to 3400 Kbit/s Transceiver buffer: 64 bytes Supported protocols: ISO14443A, , and Working temperature: -20 -85 Data retention: 10 years Reading and writing distance:Less than 20 mm Development platform:for , for UIFlow (Blockly, Python) 2x compatible holes Application:Smart Home Access Control System,Vehicle management,ntelligent transportation,Smart bookshelf (The product appearance and printed words depending on the batch, but this does not affect use) Color:As Shown Material:plastic Package Contents: 1 * RFID Sensor Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.