AROS Riello Sentinel Pro single-phase input single-phase output, online, double-conversion UPS system. Available in: 700VA 630w, 1000VA 900w, 1500VA 1350w, 2200VA 1980w, and 3000VA 2700w all with internal runtime battery backup. Also available in ER long backup version 1000VA, 2200VA and 3000VA.