CS381 Features: Support up to 12 drives in unprecedented 30 liter Micro-ATX chassis size Designed for vertical or horizontal position, allow users to freely place CS381 anywhere Includes two long-life (L10, 70,000 hours) dual ball bearing 120mm fans Hot-swap drive trays support up to eight 3.5” or 2.5” SAS-12G / SATA-6G drives with two LED indicators for displaying drive status Accommodates SFX or SFX-L power supply Support normal height expansion slots for installation of cards up to 267mm long Kensington lock on front panel for additional security Specifications: Model No. SST-CS381B Material Plastic and metal mesh front panel, galvanized steel body Motherboard Micro-ATX, Mini-DTX, Mini-ITX Drive bay External 3.5” / 2.5” SAS / SATA external hot-swapping x 8 -- Internal 2.5” (5mm ~ 15mm) x 4 (2 on left racks) HDD backplaneMini-SAS HD SFF-8643 36 pin connector x 2 HDD Interface SATA drive up to 6 Gbit/s (depends on drive speed)SAS drive up to 12 Gbit/s (depends on drive speed) Cooling system Front -- Rear 2 x 120mm 1300rpm 28dBA dual ball bearing fan Life time 70000hr (L10) Side 2 x 120mm or 3 x 80mm fan slot (optional) Top -- Bottom -- Internal -- Radiator supportRear1 x 120mm or 1 x 240mm Expansion slot 4 Front I/O port USB 3.1 Gen 1 x 2 audio x 1 MIC x 1 LED Indicator Chassis Power ON: BlueAccessing: Red blinking HDD Tray HDD Power LED : RedHDD Access : Blue blinking Power supply SFX / SFX-L PSU (sold separately) Limitation of expansion card Up to 10.5” (266.7mm), please refer to manual for more details Limitation of CPU cooler 59mm Limitation of PSU 130mm Net weight 7 KG Dimension 400mm (W) x 225mm (H) x 316mm (D) , 28 Liters15.75" (W) x 8.86" (H) x 12.44" (D) , 28 Liters Extra Kensington lock