This product functions as both a development board and a downloader/expansion module. It provides convenient interfaces for firmware programming, debugging, and expansion, simplifying the development and testing process. Perfect for smart home systems, industrial monitoring, remote data acquisition, network gateways, and other Internet of Things applications that require stable Ethernet connectivity and flexible programmability. The compact PCB layout and well-arranged headers make it suitable for integration into enclosures, control panels, and prototype setups. The board is designed for both development and small-scale deployment. Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. This product functions as both a development board and a downloader/expansion module. It provides convenient interfaces for firmware programming, debugging, and expansion, simplifying the development and testing process. Perfect for smart home systems, industrial monitoring, remote data acquisition, network gateways, and other Internet of Things applications that require stable Ethernet connectivity and flexible programmability. The compact PCB layout and well-arranged headers make it suitable for integration into enclosures, control panels, and prototype setups. The board is designed for both development and small-scale deployment. Color: As Shown Material: PCB Package Contents: 1*T-Internet-POE Expansion Board Kit 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.