Synology 5-bay DiskStation DS1525+ (Diskless) APC BX1500M Back-UPS Pro, 1500VA, Tower, 120V, 10 NEMA 5-15R outlets, AVR, LCD, 16hr Recharge, 3min Stand-by, 120V Input/Output, 5x NEMA 5-15R Surge Receptacle Synology 8-bay DiskStation DS1823xs+ (Diskless) APC BR1500MS2 Back-UPS Pro 1500VA/900W, Tower, 120V, 10x NEMA 5-15R outlets, AVR, USB A+C, LCD, User Replaceable Battery, 16hr Recharge, 4.10min Stand-by, 120V Input