Dear customer, please note that items CYBERPOWER SYSTEMS Online S 6000VA/5400W Tower UPS - 20* 12V / 7AH - Terminal Block - USB & Serial Port & SNMP Slot(OLS6000E) - 2 Yrs Adv. Replaceme are currently listed as pre-order/on order. You can continue to place a backorder and it will ensure earliest allocation when these products are available. Our team will contact you to notify the expected ETA. Thank you.