QNAP 2-bay TS-251A personal cloud NAS / DAS with USB direct access, HDMI local display Form Factor: 4-Bay Port RJ-45: 2 x 10/100/1000M Port USB: 3 x USB3.0 HDD Interface: 4 x SATA (4 x Bay) Processor: 14nm Intel Celeron N3060 dual-core 1.6 GHz (up to 2.48 GHz) Default/ Max. Memory: 2GB DDR3L (2 x 1GB) LEDs: Status/Power, USB, HDD 1, HDD 2 Power: Power: 65W AC power adapter, 100-240V AC Power Consumption: System sleep: 0.72W HDD standby:7.9W In operation:16.2W (with 2 x 2TB HDDs)