Manufacturer: QNAP (R) Hard drive sold separately Hard drive bays: 4 x 3.5" or 2.5" - SATA2 (3 Gb/s) Hot-swap: yes Lockable: yes Rear interfaces: 1 x USB-C 3.0 NOTE: This port is only for the connection of the RAID chassis to a NAS or computer. Dimensions (W x H x D): 160.2 x 168.5 x 219 mm AC adapter: 65 Watt, external Input: 100 - 240 V AC / 50 - 60 Hz fans: 1 x 12 cm (12 V DC) Warranty: 2-year bring-in. Contents: 1 x Quick Installation Guide (QIG), 1 x power adapter incl. power cable, 1 x USB-C to USB-A cable, 2 x keys, 1 x USB cable clip, 12 x screws for 2.5" Hard drives, 16 x screws for 3.5" hard drives