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 RF cards. Using magnetic field induction technology, non-contact two-way information exchange is achieved, and the information of the induction card is read and verified. 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 application:Smart Home Access Control System,Vehicle management,ntelligent transportation,Smart bookshelf 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, MIFARE, and NTAG Working temperature: -20 ℃ -85 ℃ Data retention:Greater than 10 years Reading and writing distance:Less than 20 mm Development platform: for Arduino, for UIFlow (Blockly, Python) 2x LEGO compatible holes The product appearance and printed words may vary depending on the batch, but this does not affect use Colour:As Shown Material:PC Package Contents: 1 x rfid reader 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.