Compact yet spacious, the MasterBox Q300L accommodates Micro‑ATX or Mini‑ITX motherboards with a single 3.5" drive bay and floor‑mounted PSU slot. Its magnetic dust filters keep airflow clean, while a modular I/O panel lets you choose ports. A full‑size side window showcases RGB LEDs and internal layout, and the steel‑reinforced frame ensures durability in this sleek black mini tower.