SENTINEL PRO is the latest evolution of the successful Riello Dialog Plus online UPS. This latest development has been designed with the environment in mind and is part of the Riello ECO Line of UPS. SENTINEL PRO is an on-line double-conversion UPS offering the highest levels of reliability and protection for critical servers, voice and data processing IT systems. For long runtime applications, Sentinel Pro (ER models) can be fitted with matching battery extension packs which also include additional battery boost chargers. In terms of communications, each Sentinel Pro has a built-in mimic panel with an LCD to show input and output voltages, and battery charge status. The inverter is a totally new design, fully microprocessor controlled and constructed to achieve the highest levels of operating efficiency and configuration options. SENTINEL PRO UPS also have USB communication ports as standard, with a built-in expansion slot for additional adapters, protocol converters and relate contact cards. The UPS is highly efficient. SENTINEL PRO is designed to save energy and has a power-off push-button feature to reduce energy consumption to zero, when no load is connected or switched off. Sentinel Pro models include 700VA, 1000VA, 1500VA, 2200VA and 3000VA.