APC's Specialized Rack-Mount Power Distribution Units (PDUs) provide power distribution for APC's NetShelter VX. These metered PDUs provide the ability to monitor the current draw and set alarm thresholds that when exceeded, provide both visual and audible alarms. In addition, the digital display on the unit provides on-site installers the ability to monitor the total current draw as equipment is connected to the PDU. These features virtually eliminate the possibility of an overloaded circuit. Use APC's Automatic Transfer Switch in conjunction with these Specialized Rack-Mount PDUs to provide redundant power to single-corded equipment.