The SD Storage Board with Extended Fittings - Raspberry Pi RoHS manufactured by Waveshare is a Raspberry Pi-compatible electronic storage device. It allows users to expand the storage capacity of the Raspberry Pi so that more data can be stored. This storage board is made with extended fittings to ensure optimal mounting and was manufactured with RoHS (Restriction of Hazardous Substances) compliant components that are free from hazardous materials. The board is compatible with Raspberry Pi 4 models and supports microSD cards, TF cards, and eMMC. It also features a write-protected switch, allowing users to lock their data and ensure safety. This storage board also features two micro USB connectors, allowing it to be expanded with other Raspberry Pi accessories.