Qnap Power Supply Unit For SP-8BAY2U-S-PSU, FF Internal, Environmental Certification WEEE, Input Voltage Type AC, Input Voltage Range 240 V AC. The 300W Single Power Supply for 2U Rackmount NAS/NVR from Qnap is designed for use with TS-809U-RP/859U-RP/859U-RP+/869U-RP/879U-RP/EC879U-RP/870U-RP NAS and VS-8024U-RP/VS-8032U-RP/VS-8040U-RP NVRs.