QNAP 4-Bay tower TurboNAS, (4 x 3.5″ SATA slot) ARM Cortex-A15 dual-core 1.7Ghz, 1GB RAM, SATA 6Gb/s, 2x GbE LAN, 3 x USB3.0, HDD hot-swappable, supports DLNA®, AirPlay® & Chromecast™.