Tower mount or rack mount, Topology: True sine wave, online double conversion, single phase (2W+G), compatible with diesel power generator, supports active PFC power supplies. Perfer to be used in COMMERCIAL settings due to fan noise level. The fan is on full time, may be too loud for office use. Zero Transfer Time (ms) for absolute continuous operation (on-line), For data center and mission critical systems, computers, instruments, automation. (1000VA / 1000W) input voltage: 80-150vac / output voltage: 110/115/120/127vac (50/60hz auto sensing) 8 x NEMA 5-15R, (Output voltage regulation: +/- 1 percent) 3 hours recharge time 90 percent, Cold Start (DC power on), ECO mode energy saving, Emergency power off (EPO) function, LCD screen, monitoring software included. 2 Year Limited warranty / TUV Certification (tested to UL 1778), This is updated version of DS1000B / DS1500B / DS1000B-RM / DS1500B-RM (Durable Series) Press the ON Button for FEW SECONDS to fully power on the UPS, the back outlets are then ready for your devices. Simple Plug & Play operation. Runtime chart in pictures. (Due to item value *** SIGNATURE MAYBE REQUIRE FOR DELIVERY ***) Uninterruptible power supply - the OPTI-UPS On-Line durable series DS1000E-RM tower / rackmount UPS provides true online power for power-sensitive applications, electronic measurement devices, corporate and departmental servers, UNIX servers/workstations, CAD/CAM/CAE workstations, network workstations, ATM, Kiosks, hubs/routers/bridges, testing equipment / industrial automatic instrument, and other mission critical equipment. Online operation regulates the incoming AC power and continuously offers connected applications with pure, stable sine wave output. The power capacity allows you to work through short blackouts or safely shut down after saving important files during longer ones. The OPTI-UPS durable series DS1000E-RM has 8 outlets, multi-functional LCD display, and a built-in serial port and USB port that works with the free monitoring software to manage all kinds of power information and problems. An Online UPS is not a further improvement of the standby technology, but a completely different approach to providing the highest level of power supply. A double-conversion refers to converting the incoming AC power into DC power, and inverting it back to AC power. This ensures the newly reproduced power to be of a quality standard set by UPS, to be completely cleared of all imperfections of the power coming from the AC mains. Regardless of what is going on the AC mains side, the UPS output voltage, frequency and signal purity are kept up to the highest standards. The current flow is absolutely uninterruptible, the transfer time is zero. The UPS can work in pair with diesel generator.