Evolution 650/ 850/ 1150/ 1550/ 2000 VA Evolution S 1250/ 1750/ 2500/ 3000 VA High density protection for network devices. Protection for 1 to 15 servers. Ideal for Network devices, Rack-mounted servers, Onventional rack-mounted or tower servers & Network storage systems. 650 / 3, 000VA ( 1/ 2U) Line Interactive Software Incl. 1U rack only @ 1, 550VA 2 Load segments USB and RS232 ports