APC SMX120BP is an external battery pack for the Smart-UPS X-Series, providing a separate battery resource for UPS installations in this family.
Its stated battery voltage is 120 V, with a capacity of 1200 VAh. The enclosure supports rack or tower placement, and the rackmount format is 4U, helping identify the installation space this model requires.
Choose this model for a Smart-UPS X configuration that calls for an external battery pack in this form. Its voltage, capacity and rack/tower design specify the SMX120BP variant.