Castle RT features the option of 19 inch rack mounting or tower applications. These compact units are available in 1000 VA to 6000 VA in 2 U''s. The incorporated double conversion with true Isolation technology offers the most complete power protection and highest quality power for all IT applications. The double conversion of the ISO series completely isolates incoming AC power problems converting the power to DC voltage that charges the batteries and provides power to the main transformer. The main transformer delivers constant pure sine wave output AC for all of your most critical applications. The Casles RT series provides many appealing and powerful features including true RS 232 management software, SNMP Slots for remote monitoring and control, extended backup time capacity, load sensing, overload protection, dynamic by-pass, temperature monitoring software for preventative diagnostics.