The T-ASK433-D4 is a development board/development kit RoHS manufactured by DreamLNK. It is designed to be used in RFID applications for short-range communication using the 433MHz band. It allows for the integration of RFID functions into embedded systems, such as read/write of cards and tags. It includes a series of components including a microcontroller, antennas, LED indicators, power relays, voltage regulators and extension headers. It also provides various serial protocols and interfaces like UART, I2C, SPI, USB, and Ethernet. This board is designed to support a variety of operations such as monitoring, communication, data exchange, and encryption. It is RoHS compliant and can be used in a variety of applications including industrial, automotive, medical, and security applications.