It seems like you're looking for a gaming mouse pad with a size of 800x300 mm and a shortcut key type. Here's a breakdown of what you might be referring to:

1. Gaming Mouse Pad (800x300 mm): This is a large-sized mouse pad often used by gamers. The dimensions 800x300 mm (31.5 x 11.8 inches) provide ample space for both the mouse and keyboard, giving players enough area to make precise movements without feeling cramped.

2. Shortcut Key Type: This likely refers to mouse pads that come with built-in keyboard shortcuts or programmable macro keys, which can be a useful feature for gamers, streamers, or people who use software that requires frequent shortcut commands.

Features to Look for:

• Size: 800x300 mm is quite large, so it should cover a large part of your desk, accommodating both your mouse and keyboard.
• Surface: The surface should be optimized for gaming, such as a smooth cloth or hard surface for better tracking.