1. Introduction
The A4Tech Bloody J95s is a high-performance wired gaming mouse designed for e-sports enthusiasts. It features a programmable automatic FM 5k optical engine, ergonomic design, and customizable RGB lighting. This manual provides detailed instructions for setting up, operating, and maintaining your J95s gaming mouse to ensure optimal performance.
2. Setup Guide
2.1 Connecting the Mouse
- Connect the USB cable of the A4Tech Bloody J95s mouse to an available USB port on your computer.
- Your operating system should automatically detect and install basic drivers for the mouse.
2.2 Software Installation (Blood Hand Code 7)
To unlock the full potential of your J95s mouse, including programmable button functions, sensitivity adjustments, reporting rate, and RGB lighting effects, install the Blood Hand Code 7 software.
- Download the official Blood Hand Code 7 software from the Bloody website: http://www.bloody.cn/download.php?id=6.
- After opening the download page, select your specific mouse model (J95s) and click the download button.
- If the official website is inaccessible, you can try downloading it from the Blue Cloud Drive: https://wwp.lanzn.com/b0dog9nxe (Password: g748).
- Install the software by following the on-screen instructions.
Important Note during Software Installation:
- The first time the software reads the mouse after installation, there will be approximately 20 seconds of recognition time. During this period, the mouse indicator may stop working and not light up. Please be patient and do not unplug the mouse.
- After the 'core' is injected into the mouse by the software, it can be used. Be aware that if the mouse has default functions, they will be overwritten by the software settings.

3. Operating Instructions
3.1 Basic Functions
- Left Click: Standard primary action.
- Right Click: Standard secondary action.
- Scroll Wheel: For scrolling up and down. Can also be clicked for a middle-mouse button function.
3.2 Programmable Buttons and Modes
The J95s mouse features 9 programmable buttons, including a dedicated 'Fire button' and a 3-segment mode key switch (labeled 1, N, 3).
- Fire Button (F): Located near the left click, this button can be programmed for rapid, accurate bursts, often referred to as 'Self-Oscar Firearms' in gaming contexts.
- 3-Segment Mode Key Switch (1/N/3): This switch allows you to quickly change between different firing modes or profiles, offering flexibility in complex game situations. You can customize the left key and three kinds of firepower settings via the software.
- Double Gun-Fire Key (F): Can be configured for specific double-shot actions.
- Double Gun-Left (L): Can be programmed for single clicks or various combo actions.

3.3 Optical Engine and CPI Adjustment
The J95s features an advanced optical engine with 5-stage speed regulation, allowing for precise control over your cursor speed (CPI/DPI).
- The mouse supports a resolution range from 100 to 8000 CPI.
- You can switch between 5 predefined CPI stages, often indicated by different RGB lighting colors:
- 1000 CPI (Red)
- 1200 CPI (Green)
- 1600 CPI (Yellow)
- 2000 CPI (Blue)
- 8000 CPI (Cyan)
- These settings can be customized via the Blood Hand Code 7 software.

3.4 RGB Lighting Adjustment
The J95s offers 16.8 million color RGB diffuse adjustment. The RGB light library has its own options, and you can set exclusive light effects using the Blood Hand Code 7 software.
3.5 Advanced Software Features (Blood Hand Book)
The 'Blood Hand Book' software provides comprehensive customization options for your mouse. It allows you to adapt the mouse's functions for various game types (MMO, RPG, FPS) and offers advanced features for precise control. Note that some advanced functions may require separate activation.

3.6 Ergonomics and Durability
- FPS Ergonomic Design: The mouse is designed for a comfortable grip during long gaming sessions.
- Non-Slip Flanks: Soft rubber flanks prevent slipping, ensuring a reliable grip even with sweaty hands.
- Durable Click Life: The left and right buttons are rated for 20 million clicks.
- Smooth Metal Footpads: The underside features smooth metal footpads to reduce wear and ensure consistent glide.



3.7 Product Demonstration Video
This video demonstrates the key features of the A4Tech Bloody J95s mouse, including its RGB lighting effects, programmable buttons, and how it performs in gaming scenarios.
4. Maintenance
To ensure the longevity and optimal performance of your A4Tech Bloody J95s gaming mouse, follow these simple maintenance guidelines:
- Cleaning: Regularly wipe the mouse surface with a soft, dry cloth. For stubborn dirt, slightly dampen the cloth with water or a mild cleaning solution. Avoid using harsh chemicals or abrasive materials.
- Sensor Care: Keep the optical sensor on the underside of the mouse clean and free from dust or debris. Use a cotton swab or compressed air if necessary.
- Cable Management: Avoid sharp bends or excessive pulling on the USB cable to prevent damage.
- Storage: When not in use, store the mouse in a clean, dry environment away from extreme temperatures.
5. Troubleshooting
If you encounter any issues with your A4Tech Bloody J95s gaming mouse, please refer to the following troubleshooting steps:
- Mouse Not Responding:
- Ensure the USB cable is securely connected to your computer's USB port.
- Try connecting the mouse to a different USB port.
- Restart your computer.
- Software Issues:
- If the Blood Hand Code 7 software is not detecting the mouse, ensure it is properly installed and that you waited the initial 20-second recognition period.
- Try reinstalling the software.
- Ensure your operating system is up to date.
- Inconsistent Tracking:
- Clean the optical sensor on the underside of the mouse.
- Ensure you are using the mouse on a suitable mouse pad or surface.
- Adjust the CPI settings via the software to see if it resolves the issue.
- Buttons Not Working:
- Check the button assignments in the Blood Hand Code 7 software. Default functions may have been overwritten.
- Ensure no other software is conflicting with the mouse's button functions.
For further assistance, please refer to the official user manual PDF or contact customer support.
6. Specifications

| Feature | Description |
|---|---|
| Model | J95s |
| Function | Multi-core, Intelligent Quad Core |
| Software | Blood Hand Book 7 |
| Transmission Speed | 125-2000 Hz |
| Programmable Buttons | 9 |
| Left Mode | Six Click Modes |
| Key Response | 1 Millisecond |
| Sensor | Custom Engine (e-sports level) BC3332-S |
| Resolution | 100 - 8000 cpi |
| Moving Speed | 150 ips |
| Acceleration | 25 g |
| Memory | 256 KB |
| Mouse Size | 131 x 78 x 43 mm |
| Mouse Weight | 160 g |
| Type | Wired |
| Battery Included | No |
| High-concerned Chemical | None |
| Origin | Mainland China |
| Connection Method | USB |
| Working Method | Photoelectric |
| Features | Ergonomics, Gaming Mouse, Laptop Accessories, LOL, PUBG |
7. User Tips
- Fire Button Color: Be aware that the fire button on the mouse may come in either gray or red. The color is randomly selected during packaging, so if you have a strong preference, please note this.
- Software Recognition Time: When first installing and running the Blood Hand Code 7 software, allow approximately 20 seconds for the mouse to be recognized. Do not unplug the mouse during this period, even if the indicators are off.
- Default Function Overwrite: Installing and using the Blood Hand Code 7 software will overwrite any default functions the mouse might have had. Ensure you configure your desired settings within the software.
8. Warranty and Support
For detailed warranty information and customer support, please refer to the official A4Tech Bloody website or the seller's support channels.
A user manual in PDF format is available for download, which may contain additional information and diagrams:
- User Manual (PDF): View User Manual (PDF)





