Specification Details Model Lian Li O11 Air Mini (Black) Case Type Mini Tower / Compact Mid-Tower Color Black Materials Steel body + mesh / ventilated panels + tempered glass side panel Motherboard Support Mini-ITX / Micro-ATX / (limited support for smaller ATX in some layouts) Drive Bays Multiple 2.5″ SSD mounts + 3.5″ HDD support (varies by layout) Expansion Slots 7 horizontal expansion slots Front I/O USB-C × 1, USB-A × 2, Audio In/Out, Power button Cooling Support — Front Up to 2 × 120 mm or 2 × 140 mm fans Cooling Support — Top Up to 2 × 120 mm fans Cooling Support — Rear 1 × 120 mm fan Radiator Support — Front Up to 240 mm radiator Radiator Support — Top Up to 240 mm radiator Radiator Support — Rear Up to 120 mm radiator Included Fans Varies by version; high-airflow fans commonly included PSU Support Standard ATX PSU (bottom-mount) PSU Shroud Partial shroud with cable management cutouts Tempered Glass Side tempered glass panel Dust Filtration Removable dust filters (top/front/bottom) Cable Management Cable routing channels and tie points GPU Clearance Supports standard-length GPUs in compact builds Use Case High-airflow compact gaming and productivity builds Special Feature Air-optimized ventilation with mesh front panel