Compact 2U case design for high density rack/cabinet installations Flexible Rack or Tower installation format, (wallmount available with optional kit) Rackmount ears come pre-installed on unit Rail Kit included in the box Line-interactive, True sine wave output (AC and Battery mode) Higher power factor: at least 0.9 High-frequency design Independent Battery Bypass DC Cold Start capable Automatic internal bypass Temperature-compensated battery charging Fan speed control Predictive Battery Replacement: Using install date and periodic monitoring of batteries with early warning alarms instead of calendar countdown Tool-less battery connection and replacement Hot-swappable batteries All models compatible with external battery packs Auto-recognition of external battery packs, (If the Battery Pack supports this function): automatically recalculate runtimes Unlimited runtime capability with external battery packs 1Gbit support on RJ45 protection