1. Introduction
The Razer BlackWidow V4 75% is a compact, hot-swappable mechanical gaming keyboard designed for customization and immersive gaming experiences. It features Razer Chroma RGB lighting, a durable aluminum case, and an optimized typing experience. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your keyboard.
2. What's in the Box
- Razer BlackWidow V4 75% Keyboard
- Magnetic Plush Leatherette Wrist Rest
- 2-in-1 Keycap and Switch Puller
- Important Product Information Guide
- Braided Type A to Type C Cable
3. Setup
3.1 Connecting the Keyboard
Connect the provided braided Type A to Type C cable from your computer's USB port to the USB-C port on the keyboard. The keyboard will automatically power on and begin charging if connected to a powered USB port.
3.2 Attaching the Wrist Rest
The magnetic plush leatherette wrist rest can be easily attached to the front edge of the keyboard. Align the magnetic connectors on the wrist rest with those on the keyboard until it snaps securely into place.

Figure 1: Magnetic Plush Leatherette Wrist Rest attached to the Razer BlackWidow V4 75% keyboard, providing ergonomic support.
3.3 Software Installation (Razer Synapse)
For full customization and advanced features, download and install the Razer Synapse software from the official Razer website. This software allows you to configure lighting, key assignments, and other keyboard settings.
4. Operating Instructions
4.1 Hot-Swappable Design
The Razer BlackWidow V4 75% features a hot-swappable design, allowing you to easily change mechanical switches without soldering. Use the included 2-in-1 keycap and switch puller to remove keycaps and switches. The keyboard is compatible with 3 or 5-pin switches.

Figure 2: A hand demonstrating the hot-swappable design by removing an orange tactile switch from the keyboard using the provided tool.
4.2 Compact 75% Layout with Aluminum Case
The keyboard features a compact 75% layout, ideal for saving desk space while retaining essential commands. Its durable aluminum case ensures longevity.

Figure 3: The compact 75% layout of the keyboard, showcasing its space-saving design on a gaming desk.
4.3 Optimized Typing Experience
The keyboard is engineered for a satisfying typing experience with light, balanced keystrokes. This is achieved through a gasket-mounted FR4 plate, tape-enhanced PCB, lubricated stabilizers, and two layers of sound-dampening foam.

Figure 4: Diagram illustrating the internal components that contribute to the keyboard's optimized typing acoustics.
4.4 2-Side Underglow with Per-Key Lighting (Razer Chroma RGB)
The keyboard features per-key RGB lighting and a striking 2-side underglow, fully customizable via Razer Chroma RGB. Sync your lighting effects with integrated games for enhanced immersion.

Figure 5: The keyboard displaying its customizable 2-side underglow and per-key RGB lighting.
Video 1: A demonstration of the Razer BlackWidow V4 75% keyboard's typing sounds and RGB lighting effects.
4.5 Multi-Function Roller & Media Keys
The keyboard includes a multi-function roller and dedicated media keys for convenient control over entertainment. These allow you to pause, play, skip tracks, and adjust volume or brightness.

Figure 6: Detail of the multi-function roller and media keys, highlighting their accessibility for quick adjustments.
4.6 Razer Snap Tap
Razer Snap Tap is an advanced feature accessible via Razer Synapse 4. It prioritizes the latest input between two assigned keys without requiring you to release the previous one, offering truly responsive in-game movement. Snap Tap is OFF by default and can be toggled ON/OFF in Razer Synapse.

Figure 7: Visual explanation of Razer Snap Tap, demonstrating its input prioritization for faster actions.
4.7 Software Customization (Razer Synapse)
Razer Synapse provides extensive customization options for your keyboard:
- Key Rebinding: Assign any key to perform a different function, including alphanumeric, function, numpad, navigation, modifiers, or symbols.
- Macro Recording: Create and assign complex macros to dedicated macro keys.
- Mouse Functions: Assign mouse clicks or scroll actions to keyboard keys.
- Inter-Device: Sync functions across multiple Razer devices.
- Switch Profiles: Create and switch between multiple profiles for different games or applications. Profiles can be linked to specific games to activate automatically.
- Lighting: Adjust brightness, choose from various quick effects (e.g., Spectrum Cycling, Breathing, Fire, Reactive, Ripple, Starlight, Static, Wave, Wheel), or create advanced effects in Chroma Studio.
- Razer Hypershift: Assign a Hypershift modifier key to unlock a secondary set of functions for almost every key on the keyboard.
- Launch Program/Website: Assign keys to launch specific applications or open websites.
- Multimedia Controls: Dedicated controls for volume, mute, play/pause, and track navigation.
- Windows Shortcuts: Access common Windows functions like copy, paste, refresh, or launch applications.
- Text Function: Assign a key to type a predefined string of text or special symbols.
- Gaming Mode: Disable Windows key, Alt+Tab, or Alt+F4 to prevent accidental interruptions during gameplay.
- Polling Rate: Adjust the frequency of data updates in a second (up to 8000 Hz). Higher polling rates require more processing power.
Video 2: An overview of the Razer BlackWidow V4 75% Mechanical Gaming Keyboard's features and design.
Video 3: A detailed review of the Razer Synapse software for the BlackWidow V4 75% keyboard, demonstrating customization options.
Video 4: A typing sound test of the Razer BlackWidow V4 75% keyboard.
5. Maintenance
To ensure optimal performance and longevity of your Razer BlackWidow V4 75% keyboard, regular maintenance is recommended:
- Cleaning Keycaps: Use a soft, lint-free cloth slightly dampened with water or a mild cleaning solution to wipe down the keycaps. Avoid harsh chemicals.
- Cleaning Under Keycaps: Periodically remove keycaps using the provided puller and use compressed air to clear dust and debris from beneath the switches.
- Cleaning Wrist Rest: Wipe the leatherette wrist rest with a damp cloth.
- Cable Management: Ensure the braided cable is not kinked or excessively bent to prevent damage.
6. Troubleshooting
- Keyboard Not Responding: Ensure the USB cable is securely connected to both the keyboard and the computer. Try connecting to a different USB port.
- Lighting Issues: Check Razer Synapse software for lighting settings. Ensure brightness is not set to zero. If using custom profiles, verify they are active.
- Keys Not Registering: If a specific key is not registering, try swapping the switch with a working one to determine if the issue is with the switch or the keyboard PCB.
- Software Not Detecting Keyboard: Ensure Razer Synapse is updated to the latest version. Try reinstalling the software.
7. Specifications
- Brand: Razer
- Series: BlackWidow V4 75%
- Model Number: RZ03-05000200-R3U1
- Hardware Platform: PC
- Operating System: Windows 10
- Item Weight: 3.43 pounds
- Product Dimensions: 12.64 x 6.12 x 1.52 inches
- Color: Black
- Power Source: Corded Electric
- Connectivity Technology: Wired
- Keyboard Description: Mechanical
- Recommended Uses For Product: Gaming
- Special Features: Chroma RGB, Comfortable Wrist Rest, Hot-swappable Design, Compact & Durable, Multi-Function Roller & Media Keys, Orange Tactile Switches
- Keyboard Backlighting Color Support: RGB
8. Warranty & Support
For warranty information, technical support, and additional resources, please visit the official Razer support website or refer to the 'Important Product Information Guide' included in your product box.
You can also find more information and contact support through the Razer Store on Amazon.





