Used but 100% working! The ASRock J4105-ITX motherboard is a compact Mini-ITX board designed for building a fanless NAS system with 4 SATA ports. With 2 memory slots supporting DDR4 SODIMM technology, this motherboard provides space for connecting multiple storage devices for efficient data storage and management. The ASRock brand ensures reliability and quality, making it a suitable choice for building a quiet and high-performance NAS setup.