QNAP TS-451-US Diskless System 4-Bay Personal Cloud NAS with HDMI output, DLNA, AirPlay and PLEX Support Form Factor: 4-Bay Port RJ-45: 2 x 10/100/1000M Port USB: 2 x USB3.0 + 2 x USB2.0 HDD Interface: 4 x SATA (4 x Bay) Processor: Intel Celeron 2.41 GHz Dual-core processor (burst up to 2.58 GHz) Default/ Max. Memory: 1GB DDR3L RAM (expandable up to 8GB) LEDs: Status, LAN, USB, HDD 1-4 Power: Power Consumption (W): HDD standby: 15.85W S3 sleep: 0.55W In operation: 31.07W (with 4 x 1TB HDD installed) Power Supply: External Power Adapter, 90W, 100-240V