Disconnected battery notification Warns when a battery is not available to provide backup power. Temperature-compensated battery charging Prolongs battery life by regulating the charge voltage according to battery temperature. Scalable runtime Allows additional run time to be quickly added as needed. Rack mountable Includes horizontal, vertical and toolless-mount capabilities. Boost and Trim Automatic Voltage Regulation (AVR) Eliminates voltage fluctuations as a source of AV signal degradation and component power-supply stress. Power conditioning Protects connected loads from surges, spikes, lightning, and other power disturbances. Isolated filter banks Eliminates electromagnetic and radio frequency interference (EMI/RFI) as a source of audio-video signal degradation. Dataline Surge Protection Provides protection of connected equipment from power surges on the data lines. Safety-agency approved Ensures the product has been tested and approved to work safely with the connected service provider equipment and within the specified environment. Resettable circuit breakers Enables a quick recovery from overload events. Multiple mounting methods Allows for standardization on one product for use in different environments. Front-access servicing Simplifies installation and maintenance while minimizing space requirements. Adjustable voltage sensitivity Provides the ability to adapt the UPS for optimal performance in specific power environments or generator applications. Sequenced turn on/off Helps power on components in the proper order to prevent speaker stress. Proper sequencing can also help manage current draw on startup to prevent unnecessary circuit breaker tripping. LED & display dimmer Adjust the unit's LED and display brightness independently of each other to suit your individual tastes and environment.