1. Important Safety Instructions
Read all instructions carefully before using this treadmill. Keep this manual for future reference.
- Incline Control: The incline can be adjusted up to 15% only via the handlebar buttons.
- Power Cutoff: Always use the master switch for instant shutdown.
- Magnetic Lock: The safety key must be in place for the treadmill to operate. Attach the safety clip to your clothing during use.
- Safe Stop: In case of emergency or safety lock trigger, the treadmill employs gradual deceleration technology to prevent fall risks and secondary injuries from sudden stops.
- Ensure adequate clear space around the treadmill during operation.
- Do not allow children or pets near the treadmill when it is in use.
- Consult a physician before beginning any exercise program.
2. Package Contents
Verify that all components are present before assembly:
- Treadmill Unit
- Lubricant
- Power Cord
- Safety Key
- Tool Kit (for assembly)
- User Manual (this document)

The image above displays the complete treadmill unit, showcasing its compact design and integrated console.
3. Assembly Instructions
The BMJX US T4303B treadmill is designed for quick and straightforward assembly. Most major components are pre-assembled. Follow these steps:
- Carefully remove all components from the packaging.
- Place the main treadmill base on a flat, stable surface.
- Lift the console and handlebar assembly into the upright position.
- Secure the uprights using the provided bolts and tools from the tool kit. Ensure all connections are tight and stable.
- Connect any necessary cables as indicated in the detailed visual guide.
- Insert the safety key into its designated slot on the console.
For a visual guide to the assembly process, please refer to the installation video below:

4. Operating Instructions
4.1 Basic Operation
- Power On/Off: Use the master power switch located near the base of the treadmill. The console will illuminate.
- Start/Stop: Press the 'START' button on the console to begin. The belt will start moving at a low speed. Press 'STOP' to halt the belt.
- Speed Adjustment: Use the 'Speed +/-' buttons on the console or handlebars to increase or decrease the belt speed (range: 0.6-8.7 MPH). Quick-access speed buttons (e.g., 3, 6, 9 MPH) are also available.
- Incline Adjustment: Use the 'Incline +/-' buttons on the console or handlebars to adjust the incline (range: 0-15%). Quick-access incline buttons (e.g., 3%, 6%, 9%, 12%, 15%) are also available.
- Safety Key: Always attach the safety key clip to your clothing. If the safety key is dislodged, the treadmill will stop automatically.
4.2 Console and Display
The intuitive control console features an LED display showing key metrics such as time, distance, calories, speed, and heart rate. Integrated speakers allow for audio playback.

4.3 Heart Rate Monitoring & Bluetooth Connectivity
- Heart Rate Sensors: Grip the sensors on the handlebars to monitor your heart rate, displayed on the console.
- Bluetooth Pairing: The treadmill supports Bluetooth connectivity. Pair your smartphone or tablet to the treadmill to stream music through the built-in speakers or connect to compatible fitness apps for real-time tracking and workout programs.
5. Folding and Storage
The BMJX US T4303B treadmill features a hydraulic auto-folding system for convenient storage, making it ideal for home use with limited space.
- Ensure the treadmill is powered off and unplugged.
- Gently lift the running deck until it locks into the upright, folded position. The hydraulic system assists in this process.
- To move the folded treadmill, tilt it back slightly to engage the rear transport wheels.
- Roll the treadmill to your desired storage location.
- To unfold, gently push the deck release mechanism and allow the hydraulic system to slowly lower the deck to the operating position.

The image above illustrates the treadmill in its folded state, demonstrating how it can be stored vertically to save space. The integrated wheels facilitate easy relocation.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your treadmill.
- Cleaning: Wipe down the console and exterior surfaces with a damp cloth after each use. Avoid abrasive cleaners.
- Belt Lubrication: The running belt requires periodic lubrication to reduce friction and extend its lifespan. Use the provided lubricant and follow the instructions in the detailed manual for application frequency and method.
- Belt Tension and Alignment: Periodically check the running belt for proper tension and alignment. Adjust as needed using the included tool kit and referring to the full user manual for specific instructions.
- Motor Cover: Keep the motor cover free from dust and debris to ensure proper ventilation.
7. Troubleshooting
If you encounter any issues with your treadmill, refer to the following common troubleshooting steps. For more complex problems, contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Treadmill does not power on. | Power cord not connected, master switch off, safety key not in place. | Ensure power cord is securely plugged in, master switch is on, and safety key is correctly inserted. |
| Running belt stops unexpectedly. | Safety key dislodged, motor overload. | Re-attach safety key. If due to overload, reduce usage intensity and allow motor to cool. |
| Unusual noise during operation. | Loose components, belt misalignment, lack of lubrication. | Check and tighten all visible bolts. Adjust belt alignment and apply lubricant as per maintenance instructions. |
| Belt slips or hesitates. | Loose belt tension, worn belt, insufficient lubrication. | Adjust belt tension. Lubricate the belt. If problem persists, contact customer support. |
8. Specifications
| Feature | Detail |
|---|---|
| Brand | BMJX US |
| Model Name | T4303B |
| Color | silver |
| Product Grade | Home Treadmill |
| Product Dimensions (LxWxH) | 52.76"D x 28.35"W x 8.66"H |
| Item Weight | 100 Pounds |
| Material | Acrylonitrile Butadiene Styrene (ABS), Alloy Steel |
| Maximum Speed | 8.7 Miles per Hour |
| Special Features | Auto Incline, Built-In Speaker, Foldable, Heart Rate Monitor, Shock Absorbent |
| Target Audience | Adult, Youth |
| Maximum Horsepower | 3.5 Horsepower |
| Maximum Incline Percentage | 15% |
| Assembly Required | Yes |
| Display Type | LCD |
| Power Source | Corded Electric |
| Connectivity Technology | Bluetooth |
| Control Program Name | Manual |
| Metrics Measured | Distance, Heart Rate, Incline, Speed, Time |
| Maximum Weight Recommendation | 300 Pounds |
| Deck Length | 52 Inches |
| Deck Width | 26 Inches |
| Folded Size | 25.98 x 26.77 x 43.5 inches |
| Screen Size | 6.4 Inches |
| Minimum Speed | 0.6 Miles per Hour |
9. Warranty and Support
This BMJX US T4303B Incline Treadmill comes with a 365-day warranty from the date of purchase.
For technical support, warranty claims, or any questions regarding your product, please contact BMJX US customer service. Refer to the product packaging or the official BMJX US website for contact information.