QNAP TS-109 Pro Turbo NAS 500GB. Total storage capacity: 500 GB, Hard drive capacity: 500 GB, Hard drive interface: Serial ATA II. Memory type: DDRII RAM, Internal memory: 128 MB, Flash memory: 8 MB. Processor model: SoC, Processor clock speed: 500 MHz. Power requirements: 100-240V AC, 50/60Hz, Power consumption (typical): 14.4 W. Weight: 1.2 kg