Introduction
Thank you for choosing the hjh OFFICE Gamebreaker SX 04 Gaming Chair. This manual provides essential information for the proper assembly, operation, and maintenance of your new chair. Please read these instructions carefully before use to ensure safety and optimal performance.

Image 1: Front view of the hjh OFFICE Gamebreaker SX 04 Gaming Chair in black and white synthetic leather.
The Gamebreaker SX 04 is designed to provide comfort and support during extended periods of sitting, featuring a racing-style design, robust steel frame, and multi-functional wheels suitable for various floor types. It includes a high backrest with adjustable recline and a removable lumbar cushion for enhanced ergonomic support.
1. Setup and Assembly
Your hjh OFFICE Gamebreaker SX 04 Gaming Chair is delivered disassembled. Follow these steps for a straightforward assembly process. It is recommended to have a second person assist with certain steps.
- Unpack Components: Carefully remove all parts from the packaging and verify against the included parts list (not provided in this manual, refer to your product packaging). Ensure all components are present and undamaged.
- Attach Wheels to Base: Insert the multi-functional wheels into the openings on the five-star base. Press firmly until they click into place.
- Install Gas Lift: Place the gas lift cylinder into the center hole of the five-star base.
- Assemble Seat Mechanism: Attach the tilt mechanism to the underside of the seat cushion using the provided screws. Ensure the front of the mechanism faces the front of the seat.
- Attach Armrests: Secure the 3D adjustable armrests to the sides of the seat cushion using the designated screws.
- Connect Backrest to Seat: Align the backrest with the seat assembly and secure it using the appropriate screws and brackets.
- Place Seat Assembly on Gas Lift: Carefully place the assembled seat and backrest onto the gas lift cylinder, ensuring it is centered and stable.
- Attach Lumbar Cushion: Position the removable lumbar cushion as desired for lower back support.

Image 2: The assembled chair, showcasing its ergonomic form and design.
2. Operating Instructions
The Gamebreaker SX 04 chair offers several adjustment options to customize your seating experience for maximum comfort and ergonomic support.
2.1. Seat Height Adjustment
To adjust the seat height:
- To raise the seat: While standing, pull the lever located on the right side of the seat upwards. The seat will rise automatically. Release the lever at the desired height.
- To lower the seat: While seated, pull the lever located on the right side of the seat upwards. The seat will lower. Release the lever at the desired height.

Image 3: Illustration of seat height adjustment (vertical arrows) and backrest recline mechanism.
2.2. Backrest Recline Adjustment
The backrest can be reclined from 90 degrees (upright) to 180 degrees (flat position) for resting.
- To recline: Pull the lever located on the left side of the seat upwards. Lean back to the desired angle. Release the lever to lock the backrest in position.
- To return to upright position: Pull the lever on the left side upwards and lean forward slightly. The backrest will return to its upright position. Release the lever to lock.

Image 4: Visual representation of the backrest's recline capability, from 90 to 180 degrees.
2.3. Armrest Adjustment
The 3D armrests offer multiple adjustment options:
- Height Adjustment: Press the button on the side of the armrest and move it up or down. Release the button to lock at one of the 6 available positions.
- Radial Adjustment: The armrest pads can be rotated inwards or outwards to suit your arm position.
- Vertical Adjustment: The armrest pads can also be moved forward or backward.

Image 5: Detailed view of the 3D adjustable armrests and seat cushion texture.
2.4. Tilt Mechanism and Tension Adjustment
The chair features a tilt mechanism with individual weight adjustment.
- Tilt Lock/Unlock: Pull the lever on the right side (same as height adjustment) outwards to unlock the tilt function, allowing the chair to rock. Push it inwards to lock the chair in an upright position.
- Tilt Tension: Rotate the round knob located underneath the seat, at the front of the mechanism. Turn clockwise to increase tilt tension (requiring more force to recline) or counter-clockwise to decrease tension (allowing easier recline).
3. Maintenance
Regular maintenance will extend the life and appearance of your gaming chair.
- Cleaning the Upholstery:
- For synthetic leather and fabric surfaces, wipe regularly with a soft, damp cloth.
- For stubborn stains, use a mild soap solution and a soft cloth. Avoid abrasive cleaners or solvents, as these can damage the material.
- Dry immediately with a clean, dry cloth.
- Wheel Maintenance: Periodically check the multi-functional wheels for accumulated dust, hair, or debris. Clean them to ensure smooth movement and prevent scratching of floor surfaces.
- Hardware Check: Every few months, check all screws and bolts to ensure they are tight. Retighten if necessary to maintain stability and safety.
- Avoid Direct Sunlight: Prolonged exposure to direct sunlight can cause the upholstery to fade or crack. Position the chair away from direct sunlight when possible.
4. Troubleshooting
If you encounter any issues with your hjh OFFICE Gamebreaker SX 04 Gaming Chair, refer to the following common problems and solutions:
- Chair Squeaks or Creaks:
- Check all assembly bolts and screws and tighten them.
- Apply a small amount of silicone-based lubricant to moving parts of the tilt mechanism or gas lift if the noise persists.
- Gas Lift Not Adjusting Height:
- Ensure the height adjustment lever is fully engaged or disengaged as required.
- If the gas lift completely fails, it may need replacement. Contact customer support.
- Chair Feels Unstable:
- Verify that all components are correctly assembled and all screws are securely tightened.
- Ensure the chair is on a flat, even surface.
- Wheels Not Rolling Smoothly:
- Clean any debris (hair, dust, etc.) from the wheel casters.
- Ensure the wheels are properly inserted into the base.
5. Specifications
| Model Number: | 734234 |
| Brand: | hjh OFFICE |
| Color: | Black/White |
| Material: | Fabric, Synthetic Leather |
| Frame Material: | Alloy Steel |
| Overall Dimensions (H x W x D): | 137-147 cm x 74 cm x 66 cm |
| Seat Height Adjustment: | 51 cm - 61 cm |
| Seat Width: | 37 cm |
| Seat Depth: | 52 cm |
| Backrest Height: | 86 cm |
| Armrest Height Adjustment: | 17 cm - 25 cm |
| Maximum Load Capacity: | 120 kg |
| Product Weight: | 21.3 kg |
| Wheels: | Multi-functional, 11mm x 50mm |
| Recommended Sitting Duration: | Max. 8 hours/day |

Image 6: Dimensional diagram of the gaming chair, showing height, width, depth, and armrest ranges.
6. Warranty and Support
6.1. Limited Warranty
hjh OFFICE products are manufactured to high-quality standards. This product comes with a limited warranty against manufacturing defects in materials and workmanship. Please retain your proof of purchase for warranty claims. The warranty period and terms may vary by region. For specific warranty details, please refer to the documentation included with your purchase or visit the official hjh OFFICE website.
6.2. Customer Support
If you have any questions, require assistance with assembly, or need to report a defect, please contact hjh OFFICE customer support. Our team is available to provide expert advice and support.
- Online Support: Visit the official hjh OFFICE website for FAQs, support resources, and contact forms.
- Contact Information: Refer to your product packaging or the hjh OFFICE website for specific contact details (phone, email) for your region.





