# ATTACK SHARK X820 Ultra — 75% wireless gaming keyboard with hot-swap switches

Tags: keyboard, attack-shark, x820-ultra, 75-percent, wireless-gaming-keyboard, hot-swappable
Source: https://www.amazon.co.jp/dp/B0FHPQQ37F
Article page: https://web-autoai.com/articles/attack-shark-x820-ultra-75-rgb-bt?lang=en

Prices and ratings change over time — check the article page for the current values.

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## Overview
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. Check the retailer's page for the latest price.

## 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
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
- 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.