Sentinel Dual 4 kVA is the newest SDU entry-level model. The 4 kVA version is now available for your IT and security applications. Riello UPS completes its Sentinel Dual range with the 4 kVA single-singlephase model to ensure maximum power reliability for IT and voice-data applications and in security. The SDU range provides maximun reliability with ON-Lines double conversion technology and tower and rack installations. As entry-level, Sentinel Dual 4 kVA has an output power factor 0.9. Please Visit our website for more information. Source : Riello UPS