The be quiet! Dark Base Pro 900 Black rev. 2 is the perfect case for all who expect the highest standards when it comes to modularity, compatibility and design.Features- Motherboard tray and HDD slots with enhanced possibilities for individual requirements- Three Silent Wings 3 140mm PWM fans- Stepless dual-rail fan controller is switchable between Silence and Performance modes- Ready for radiators up to 420mm Full-circuit airflow system with noise-reducing vents- Completely sound insulated with decoupled motherboard, PSU and drives- PSU shroud and smart HDD slot covers provide a neat interior- Side panel made of tinted and tempered glass- RGB LED illumination with six switchable colors and motherboard control option- USB 3.1 Type C Gen 2 and USB fast charging available- Wireless charger for Qi enabled devices- Three years manufacturerfs warranty- German product conception, design and quality controlSpecifications- Form Factor: E-ATX, XL-ATX, ATX, M-ATX, Mini-ITX- Colour: Silver - Case size (W x H x D), (mm): 243 x 586 x 577- Drive bays: up to 2x 5.25 external, up to 7x 3.5 (5 included), up to 14x 2.5 (10 included)- Expansion slots: 8- Preinstalled fans (mm) / (rpm): Front: 2x Silent Wings 3 140 / 1,600, Rear: 1x Silent Wings 3 140 / 1,600- Optional fans (mm): Front: 1x 140 (w/o ODD cage, bracket included), Top: 3x 140 / 4x 120 / 1x 180, PSU shroud: 1x 120, Bottom: 2x 140/120- Optional radiators (mm): Front: 120, 140, 240, 280, 360, 420. Top: 120, 140, 180, 240, 280, 360, 420, Rear: 140, 120- I/O Panel: 2x USB 3.0, 1x USB 3.1 Type C Gen. 2, USB quick charging option, HD audio (microphone + headphones), RGB control switch, HDD status display- PSU: PS2 ATX (not included)- Maximum Dimensions: CPU cooler: up to 185, PSU: 150 - 284, GPU: 325/470 (w/o HDD bracket)- Weight (kg): 15 (net) / 16.52 (gross)- Material: 0.8mm 1mm SECC, 0.8mm aluminum, ABS plastic, 4mm tinted and tempered glass- Noise Cancellation: Sound insulation mats (front cover / side panel / top cover), Anti-vibration rubber, Decoupled HDD / PSU / motherboard tray- Cooling Solutions: Air channels (top / front / side), Stepless fan controller (8x PWM), switchable between Silence and Performance Mode, PWM hub and manual control- Special Features: Wireless charger for Qi enabled devices, Switchable multi mode, multi color expandable RGB LED lightning (white, red, green, blue, orange, purple), supports motherboard LED control