The PowerShield Commander UPS is designed to deliver clean power to and promote reliable electrical operation for all types of IT equipment in a network environment. The Commander protects your devices against power failures, power surges, under and over voltages that can harm your equipment or result in corrupted data. The PowerShield Commander UPS provides cost effective and a high level of protection for sensitive electronic devices while offering options for graceful shutdown of valuable IT equipment.The PowerShield Commander includes the highest surge rating of any standard UPS. 1558 Joules / 40,000 Amp surge protection.