Synology DS916+ (2GB) Diskless System Network Storage Form Factor: 4-Bay Port RJ-45: 1 x 10/100/1000M Port USB: 3 x USB3.0 Port eSATA: 1 x eSATA HDD Interface: 4 x SATA (4 x Bay) Processor: Intel Pentium N3710 Quad Core 1.6 burst up to 2.56 GHz Default/ Max. Memory: 2GB DDR3 Power: Power Supply Unit / Adapter: 100W AC Input Power Voltage: 100V to 240V AC Power Frequency: 50 / 60Hz, Single Phase Power Consumption: 30W (Access), 13 W (HDD Hibernation)