This article covers ATTACK SHARK (アタックシャーク) X820 Ultra 75% ワイヤレス ゲーミング メカニカル キーボード ホットスワップ可能 ガスケットマウント RGB バックライト BT.

Overview

The ATTACK SHARK X820 Ultra is a 75% layout wireless gaming mechanical keyboard that packs premium features into a compact form. A smart TFT display and metal control knob sit at the top right, giving you real-time visual feedback for RGB adjustments, battery status, connection info, and more. It uses a gasket mount structure with multiple layers of acoustic foam (PORON, IXPE, PET, EPDM, molded silicone) for a soft, deep typing sound. Hot-swappable custom linear switches come pre-installed, and you get two extra switch sets in the box.
Tri-mode connectivity (2.4GHz, Bluetooth 5.1, USB-C wired) and a 4000mAh battery mean you can use it wirelessly for days. The PBT double-shot keycaps, south-facing RGB LEDs, and QMK Web driver support make it highly customizable. At around ¥19,729 in Japan, it sits in the mid- to high-tier segment, competing with keyboards that often cost more.

Connectivity & Compatibility

The X820 Ultra offers three connection methods: 2.4GHz wireless via the included dongle for low-latency gaming, Bluetooth 5.1 for toggling between up to three devices, and a wired USB-C connection for zero-lag use or charging while typing. Windows and macOS are both supported; a dedicated key switches between OS modes.
It works with PCs, laptops, and tablets. The hot-swap socket accepts any standard 3-pin or 5-pin MX-style switches (no soldering required). Keycaps are also MX-compatible, so you can replace them with any standard Cherry MX cross-shaped keycap set.

Product Info

Released in 2025, the ATTACK SHARK X820 Ultra is available on Japanese online retailers for around ¥19,729 (tax included). It comes with a 1-year manufacturer warranty. The box includes the keyboard, USB-C cable, keycap puller, switch puller, a set of Gift Switches (45g actuation, 60g bottom-out), a set of Shark Switches (42g actuation, 48g bottom-out), and a user manual.
Positioned as a mid- to high-tier keyboard, it offers features typically found on more expensive models—TFT screen, gasket mount, advanced acoustic dampening—at a competitive price. This makes it a strong option for gamers and typists who want premium feel without breaking the bank.

Best Use Cases

  • Competitive Gamers (FPS, battle royale): The compact 75% layout frees up mouse space. Linear switches provide fast, smooth keypresses, and the 2.4GHz wireless is almost indistinguishable from wired. If you need a number pad, consider a separate one or a full-size keyboard.
  • Typists and Light Creators: The gasket mount and foam layers produce a deep, satisfying sound that isn't too loud. Hot-swap allows you to experiment with different switch types for your preferred feel. Heavy typists might want even quieter switches for shared spaces.
  • Multi-Device Users: Switch between your PC, tablet, and phone via Bluetooth. The keyboard is compact enough to toss in a bag. If you heavily rely on macros, use the QMK Web driver to remap keys.
  • Custom Keyboard Newcomers: With hot-swap sockets, a Web driver for remapping, and included switch samples, this is a fantastic entry point into the custom mechanical keyboard hobby—no soldering required.

Product Disclosure (Amazon)

  • Manufacturer: ATTACK SHARK
  • Seller: INFP trade
  • Fulfilled by: INFP trade
  • ASIN: B0FHPQQ37F
  • Note: This article covers a manufacturer-made product based on Amazon listing details.