1. Introduction
Welcome to the MassaMAX 4D Massage Chair MT398 user manual. This guide provides essential information for the safe and effective operation, maintenance, and troubleshooting of your new massage chair. Please read this manual thoroughly before initial use and retain it for future reference.
Important Safety Information:
Please read the instruction manual carefully before using the product to ensure safe operation and prevent injury or damage.
2. Product Components Overview
The MassaMAX 4D Massage Chair MT398 is designed with several key components working together to provide a comprehensive massage experience. Familiarize yourself with the main parts of the chair.

Figure 2.1: MassaMAX 4D Massage Chair MT398. This image shows the full massage chair from a slight angle, highlighting its modern design and Space White color.
- Main Body: Houses the massage mechanisms, seating, and armrests.
- Footrest: Extendable section for leg and foot massage.
- Control Panel: Integrated touchscreen for program selection and adjustments.
- Airbags: Located in shoulders, arms, hips, legs, and feet for compression massage.
- Rollers: 4D massage rollers along the SL track, and foot rollers.
- Heating Elements: Lumbar and calf areas.
- Accessories: Protective floor mat and dust cover.
3. Setup and Installation
Careful setup is crucial for the optimal performance and longevity of your massage chair. Please follow these general guidelines for installation.
3.1 Unpacking and Placement
- Unpack: Carefully remove all components from the packaging. Retain packaging materials for potential future transport or service.
- Doorway Clearance: Ensure your doorway has a minimum width of 29.92 inches for the chair to pass through.
- Placement: Place the chair on a flat, stable surface. Use the included protective floor mat to safeguard your flooring. Ensure adequate space around the chair for reclining and zero-gravity functions (refer to dimensions below).

Figure 3.1: Minimum Doorway Width and Chair Dimensions. This diagram illustrates the required doorway clearance of 29.92 inches and provides overall dimensions of the massage chair for placement planning.
3.2 Assembly (General Steps)
While specific assembly steps may vary, general assembly typically involves attaching the footrest and side panels. Refer to the detailed assembly instructions provided in the separate assembly guide included with your purchase.
3.3 Power Connection
- Connect the power cord securely to the chair's power inlet.
- Plug the power cord into a grounded electrical outlet.
- Ensure the power switch (usually located near the power inlet) is in the 'ON' position.
4. Operating Instructions
Your MassaMAX 4D Massage Chair MT398 offers a variety of advanced features for a personalized massage experience. This section details how to utilize these functions.
4.1 Control Interface
The chair can be controlled via the integrated touchscreen display, quick access buttons on the armrest, and voice commands.

Figure 4.1: Control and Convenience Features. This image highlights the USB charging port, quick access buttons, wireless charging pad, touchscreen display, and integrated Bluetooth speaker.
4.2 Advanced 4D Massage Technology
The 4D massage rollers provide a dynamic massage experience by adjusting width, height, depth, and speed. This allows for a highly customized massage that adapts to your body's contours and preferences.
- Adjustable Intensity: Select from 5 massage intensities (weak to strong).
- Adjustable Width: Customize the horizontal spread of the rollers (0.59-8.27 inches).
- Adjustable Depth: Control how far the rollers protrude (up to 4.72 inches).
- Adjustable Speed: Modify the speed of the roller movements.

Figure 4.2: Advanced 4D Massage Mechanism. This diagram shows the adjustable width, depth, and the 53.15-inch S+L shape long rail of the 4D massage rollers.
4.3 SL Track & Airbag Massage System
The SL track design ensures comprehensive massage coverage from your neck down to your thighs. Strategically placed airbags provide compression massage to various body parts.
- SL Track: Provides extended roller coverage along the natural curve of your spine.
- Airbag Locations: Shoulders, arms, hips, legs, and feet.
- Airbag Function: Inflate and deflate to provide gentle compression, promoting circulation and muscle relaxation.

Figure 4.3: Key Features Overview. This graphic illustrates the chair's main functionalities such as SL Track, 4D massage mechanism, Zero Gravity, Heating, Bluetooth speaker, and more.
4.4 Zero Gravity & Soothing Heat Therapy
Experience a feeling of weightlessness with the zero-gravity recline, which elevates your legs above your heart, reducing pressure on your spine. Targeted heat therapy further enhances relaxation.
- Zero Gravity Positions: Three adjustable positions to optimize spinal decompression and comfort.
- Lumbar Heating: Gentle warmth applied to the lower back area to soothe muscles.
- Calf Area Heating: Heat applied to the calf muscles to improve circulation and relieve tension.

Figure 4.4: Heating Function. This image highlights the specific areas for lower back heating therapy and calf area heating therapy.
4.5 Full Body Stretching (Yoga Stretch)
The yoga stretch function gently extends and decompresses your body, promoting flexibility and relieving overall tension. This feature is designed to mimic stretching exercises.

Figure 4.5: Yoga Stretching Function. This image illustrates the full-body stretching capability of the chair, designed to enhance flexibility.
4.6 Foot Rollers and Extendable Footrest
The footrest features specialized rollers and airbags to provide a comprehensive foot and calf massage. The footrest is manually extendable to accommodate various user heights.
- Foot Rollers: Provide scraping massage to the soles of your feet.
- Calf Airbags: Squeeze and release to massage the calf muscles.
- Foot Airbags: Squeeze and release to massage the top and sides of the feet.
- Manual Extendable Footrest: To maintain the extended position, gently press with your feet. It extends up to 5.91 inches.

Figure 4.6: Foot and Calf Massage. This diagram details the calf airbags, foot airbags, and foot roller scraping massage components.

Figure 4.7: Extendable Footrest. This image shows the manual telescopic leg extension, indicating a maximum extension of 5.91 inches.
4.7 Pre-programmed Massage Modes
The chair includes 15 auto programs designed for various massage needs. Select your desired program from the touchscreen interface.
4.8 Body Scan Technology
Before each massage, the chair performs a body scan to map your unique body shape and adjust the massage rollers for optimal coverage and effectiveness.

Figure 4.8: Body Scan Technology. This image illustrates the chair's body scanning feature, which customizes the massage experience to the user's physique.
4.9 Media Integration
The chair features an integrated Bluetooth speaker for audio playback and convenient charging options for your devices.
- Bluetooth Speaker: Connect your device via Bluetooth to enjoy music or audio during your massage.
- USB Charging: A USB port is available for charging compatible devices.
- Wireless Charging: A wireless charging pad is integrated for compatible smartphones.
5. Maintenance and Care
Proper maintenance ensures the longevity and optimal performance of your MassaMAX 4D Massage Chair MT398.
5.1 Cleaning
- Surface Cleaning: Wipe clean with a soft, damp cloth. Avoid abrasive cleaners or harsh chemicals that may damage the upholstery.
- Dust Cover: Use the included dust cover to protect the chair from dust, pet hair, and scratches when not in use.
- Power Off: Always unplug the chair from the power outlet before cleaning.
5.2 Storage
If storing the chair for an extended period, ensure it is clean, covered with the dust cover, and stored in a dry, temperate environment away from direct sunlight.
6. Troubleshooting Guide
This section addresses common issues you might encounter with your massage chair. For problems not listed here, please contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Chair does not power on. | Power cord not connected; power switch off; power outlet issue. | Ensure power cord is securely plugged in. Check if the power switch is ON. Test the outlet with another device. |
| Massage rollers are not moving. | Program not selected; safety sensor activated. | Select a massage program from the control panel. Ensure no obstructions are blocking the rollers. |
| Airbags are not inflating. | Airbag function not activated; air pump issue. | Verify airbag massage is enabled in the selected program or manual settings. |
| Heating function is not working. | Heating function not activated. | Ensure the heating function is turned on via the control panel. Allow a few minutes for the heat to become noticeable. |
| Bluetooth speaker not connecting. | Bluetooth not enabled on device; chair's Bluetooth not discoverable. | Ensure Bluetooth is enabled on your mobile device. Check the chair's manual for Bluetooth pairing instructions. |
7. Product Specifications
Detailed technical specifications for the MassaMAX 4D Massage Chair MT398.
| Feature | Detail |
|---|---|
| Brand | MassaMAX |
| Model Name | MT398 |
| Color | Space White |
| Product Dimensions (D x W x H) | 64.57"D x 29.92"W x 47.2"H |
| Item Weight | 190 pounds |
| Maximum Weight Recommendation | 190 Pounds |
| Back Style | Solid Back |
| Special Features | Arm Rest, Cushion Availability, Ergonomic, Heated, Reclining |
| Product Care Instructions | Wipe Clean |
| Recommended Uses | Relaxing |
| Included Components | Arm Pad, Cushion, Protective Floor Mat, Dust Cover |
| Reclining Position Count | 4 (including Zero Gravity positions) |
| UPC | 850036071419 |
| Manufacturer | MassaMAX |
| Date First Available | February 2, 2024 |
8. Warranty Information
The MassaMAX 4D Massage Chair MT398 comes with a manufacturer's warranty to cover defects in materials and workmanship. Specific warranty terms and conditions apply.
- Standard Warranty: A 3-year full-coverage warranty is typically offered by MassaMAX for this product.
- Extended Protection Plans: Additional protection plans are available for purchase, including 2-Year and 3-Year options, which may offer extended coverage beyond the standard manufacturer's warranty.
- For detailed information regarding your specific warranty coverage and to register your product, please refer to the warranty card included with your purchase or contact MassaMAX customer support.
9. Customer Support
Should you require assistance with your MassaMAX 4D Massage Chair MT398, please contact our customer support team.
- Manufacturer: MassaMAX
- Seller: MASSAGE CHAIR MAX (via Amazon)
- Contact Information: Please refer to the contact details provided in your product packaging or visit the official MassaMAX website for the most current support information.
- When contacting support, please have your model number (MT398) and purchase date available.
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