Lay the foundation for your next small form factor build using the black ASUS A21 Mid-Tower Case. With support for micro-ATX and mini-ITX motherboards, this case takes up less space on your desk without sacrificing powerful compatibility, making it perfect for those who game in compact spaces.

Featuring a steel frame and tempered glass side panel, the A21 case features five expansion slots, a 2.5" drive bay, and two drive bays that fit either 2.5 or 3.5" drive bays for future additions and storage expansion.

Micro-ATX and Mini-ITX Support    Steel Frame & Windowed Side Panel    2 x 2.5 or 3.5" Drive Bays    1 x 2.5" Drive Bay    5 x Expansion Slots    2 x USB 3.2 Gen 1 Ports, Audio In/Out    Supports GPUs up to 15" Long

Two USB-A 3.2 Gen 1 ports can be used for peripherals like a mouse and keyboard. The input and output 3.5mm audio jacks allow you to connect headphones and a microphone to your system.

To cool your system, this case supports up to three 120mm or two 140mm fans in the front and top panels and a single 120mm fan in the back. For water cooling, radiators up to 360mm can fit in the front or top while the rear can hold a 120mm radiator.

This case fits GPUs up to 380mm long, PSUs up to 210mm long, and CPU coolers up to 165mm in height. BTF hidden-connector motherboards are also compatible with this case, and with the 3mm-wide rear compartment, you can maximize clean cable management.

Related Questions and Answers

Q: 1. What is the angle of view? Will the webcam auto focus out to infinity?

A: The ASUS Webcam C3's field of view angle is not supplied from the manufacture, but from the information they do supply, I would estimate 90-120 degree horizontal field of view. Since they wide angle lens is a fixed focal length , you cannot zoom in/out with the lens, there are no autofocus capabilities with this webcam.

Q: 2. Where can I download drivers to support usb c cable to usb c

A: Here is a link to the ASUS support page for the MB16ACV ZenScreen 16" 16:9 IPS Portable Monitor: https://www.asus.com/us/Displays-Desktops/Monitors/ZenScreen/ZenScreen-MB16ACV/

Q: 3. Is the keyboard backligthed? Has numeric keyboard?

A: Yes, the ASUS 15.6" Vivobook S 15 Laptop (Midnight Black) has a backlit keyboard and a number pad to the right of it.

Q: 4. Does it have a SATA 3 port for installing additional 2.5 inch SSD?

A: The ASUS 15.6" Vivobook S 15 Laptop does not have an additional 2.5" port or a M.2 port. To expand the storage, you would need to purchase an external SSD and plug it into one of your USB ports.

Q: 5. If it does not have Bluetooth, how does it connect to the computer?

A: The ASUS Webcam C3 connects to the host computer via USB 2.0.

Q: 6. Is this a type A or a type C? it has both listed. I have an asus vivobook laptop, is it compatible?

A: The ASUS ZenDrive U9M External DVD Writer (Black) BH #ASDRW08U9MUB comes with USB Type-A and USB Type-C cables.

Q: 7. Will this fit a Canon EF 75-300mm f/4-5.6 III lens?

A: No I don't think so sorry.

Q: 8. How can it be place it in bypass mode?

A: Thank you for your inquiry. To correctly put the Symmetra LX into bypass please follow the following guide. https://www.apc.com/us/en/faqs/FA157468/

Q: 9. It isn't obvious from the description but is this the OLED version?

A: No, the ASUS 15.6" Vivobook S 15 Laptop (Midnight Black) in this listing is the LCD version. Please see the following link for the OLED version we carry: https://bhpho.to/3XOpjJZ.

Q: 10. Will this case hold a Canon EF-S 55-250mm f/4-5.6 IS II lens?

A: I use this case for a TAMRON 70-300mm lens. With the back cover, UV protector, cap and a cap-keeper (elastic around lens with little button that sticks to the cap), my whole lens is 6 1/8 in. long. That fits, but it's a bit tight. I also keep the lens hood in the bottom which is fine because the lens fits through it. So, measure the length of your lens setup like you want it to go in there.This case has a mesh pouch in the lid which I can't use due to the length issue, but it could hold a battery, memory card or filter (but probably not in filter's original case) if you have a shorter lens.The interior diameter is 3-3 1/2 in. with good padding, almost 1/2 in. thick. My lens has plenty of room at just under 3 in. at widest point, still protected well. I have this case velcroed onto a matching Lowenpro zoom bag. Fits nice and tight, but the whole thing is a little unbalanced with no exterior pouch on the other side. That would be way too big for me. I compensate by wearing it cross-shoulder rather than in front with a chest or waste strap