Bloody B640 Optical Keyboard
Bloody B640 Optical Keyboard

The Bloody Hand

Bringing the functionality of a full-sized keyboard with N-key rollover and a 1,000Hz report rate, A4 Tech introduces the Bloody B640 Keyboard, built with optical switches to give you the fastest gaming experience possible. Get into the mood with red LED backlighting and feel the caress of textured, grooved, silicon WASD keys so you never lose your place as your fingers fly across the keys.

Bloody B640 Optical Keyboard

This keyboard uses a new innovative switch that was recently invented by A4Tech and is Cherry MX Compatible

Cut the Chatter

You’ve moved on from your rubber dome keyboard and jumped into the smooth existence that is mechanical keyboards, but one of your keys keeps double tapping. It’s not your technique that’s suffering, but a phenomenon called key chattering. Most mechanical switches work by metal-on-metal contact, but their flexibility can cause them to bounce and be registered twice. The Bloody B640 keyboard’s optical switches eliminate that problem by removing any physical switch contact, keeping you at a 100% hit rate.

Bloody B640 Optical Keyboard

Deactivate a Laser with a Click

Instead of touching two pieces of metal together, each key is outfitted with an optical sensor and light source which registers the keystroke at the speed of light. Every key press is registered as soon as the light beam is interrupted allowing for unparalleled accuracy and speed. Relying purely on the life of led instead of any physical components you can safely click away to your hearts delight without worrying about any key failure.

Bloody B640 Optical Keyboard


  • A4 Tech
  • 104 keys
  • N-key rollover
  • 1,000 Hz report rate
  • Built-in 160K memory
  • Removable palmrest
  • Auto/Turbo key settings
  • Slant angle keycap design
  • Convex silicon WASD keys
  • Anti-slip keyboard lifts
  • 6 ft (1.8 m) braided USB cable
  • 7 multimedia hot-keys
  • Windows key lock mode
  • Self-defined backlight keys
  • 6 backlight modes: 100% full breathing, 60% primary area breathing, 100% full on, 60% on, touch lighting, and marquees
  • 17.7 x 5.4 x 1.5 in (449 x 137 x 37.5 mm)
  • 2.8 lbs (1265 g)
Bloody B640 Optical Keyboard
Bloody B640 Optical Keyboard
Bloody B640 Optical Keyboard
Bloody B640 Optical Keyboard


  • Braided USB cable
  • Key Dominator software
  • Removable wrist rest


All orders will be shipped by Massdrop.

Estimated ship date is Dec 29, 2014 PT.

After the drop ends, payment will be collected. To deliver the best value to the group the request will then be submitted to the vendor up front, making all sales final. Be sure to check the discussion page for updates.