Provides pure sine wave output which is recommended by server manufacturers using active power factor corrected (PFC) power supplies. Safety agency tested & approved means that you can deploy Smart-UPS with complete confidence that they meet or exceed the industry's most rigorous standards. Network grade power conditioning protects from damaging surges & disruptive noise. The double conversion architecture provides tight voltage regulation, frequency regulation, and zero transfer time to battery during power events. Intelligent battery management, pioneered by APC, maximizes battery performance & life through intelligent, precision temperature compensated charging. Automatic self tests insure battery reliability & warn customers in advance of battery replacement. Convenient, easy to connect, hot-swappable battery modules provide battery replacement without powering down.