Introduction
Welcome to the MYTHIA 2025 A303 Massage Chair iRest System 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.

The MYTHIA 2025 A303 Massage Chair in black, showcasing its sleek design and full-body coverage.
Safety Information
For your safety and to prevent damage to the product, please adhere to the following guidelines:
- Please read and follow all assembly instructions carefully. Ensure that the chair is fully assembled and stable before use.
- This chair has a maximum weight recommendation of 260 pounds. Exceeding this limit may cause damage to the chair or injury to the user.
- Always use the chair within the recommended weight limit and follow all safety guidelines provided in the user manual.
- Do not allow children or pets to play on or around the massage chair.
- Keep the chair away from water, heat sources, and direct sunlight.
- Unplug the chair from the power outlet when not in use or before cleaning.
Product Features
The MYTHIA A303 Massage Chair is equipped with advanced features designed for optimal relaxation and therapeutic benefits:
- Full-Back Body Scan for Perfect Fit: The chair automatically scans your shoulders and back, adapting the massage path to your height and body shape, ensuring precise, tailored coverage from neck to waist.
- 8 Auto Programs & 5 Massage Techniques: Switch between Comfort, Relax, Neck & Shoulder, Back & Waist, Energy, Fatigue Recovery, Hip Care, and Sleep modes. Combine with Shiatsu, Kneading, Tapping, Knocking, or Kneading-with-Tapping to match your mood and needs.
- Adjustable Intensity & Targeted Relief: Easily control speed, width, and air pressure (3 levels) to go from a gentle unwind to deep-tissue relief. Focus on your full back, upper back, lower back, a partial zone, or a fixed point for pinpoint accuracy.
- Zero-Gravity Recline & Air Compression: Recline into one of three zero-gravity positions to take pressure off your spine. Arm, calf, and foot airbags wrap around you to boost circulation and release built-up tension.
- Heat, Foot Rollers & Easy Remote Control: Soothing carbon-fiber lumbar heat loosens tight muscles, while under-foot rollers refresh tired soles. All functions are at your fingertips with the LCD handheld remote and armrest shortcut keys.

Detailed view of the intelligent mechanical massage hands, designed to mimic natural hand movements for a comprehensive massage.

Illustration of the 53.15-inch SL track, demonstrating how it follows the natural curve of the spine from neck to thigh.

Visual representation of the automatic body scan system, which customizes the massage experience to the user's unique body contours.

The massage chair reclined into a zero-gravity position, designed to alleviate spinal pressure and enhance relaxation.

The extendable footrest, showing its 7.9-inch extension capability to accommodate users of various heights.

Diagram illustrating the air compression airbags in the arms, calves, and feet, along with the foot rollers for comprehensive relief.

Close-up of the integrated Bluetooth and HD speaker system, providing immersive 360-degree surround sound for an enhanced massage experience.
Setup
The MYTHIA A303 Massage Chair is designed for relatively easy assembly. Please follow the instructions provided in the packaging for detailed steps. Key points include:
- Only needs 5 minutes to install the Footrest.
- Ensure all components are present before beginning assembly.
- Place the chair in a location with sufficient space for full recline and extension.
- Connect the power cord securely to a grounded outlet.

Diagram showing the dimensions of the MYTHIA A303 Massage Chair and recommended user height and weight limits for optimal use.
Operating Instructions
To begin your massage experience, ensure the chair is powered on. Use the LCD handheld remote or the armrest shortcut keys to navigate the various functions:
- Power On/Off: Press the power button on the remote or armrest to turn the chair on or off.
- Auto Programs: Select from 8 pre-programmed massage routines (Comfort, Relax, Neck & Shoulder, Back & Waist, Energy, Fatigue Recovery, Hip Care, Sleep) for a quick and tailored session.
- Manual Control: Adjust massage techniques (Shiatsu, Kneading, Tapping, Knocking, Kneading-with-Tapping), speed, width, and air pressure levels manually.
- Targeted Massage: Use the remote to focus massage on specific areas such as full back, upper back, lower back, a partial zone, or a fixed point.
- Zero Gravity: Activate the zero-gravity recline feature to elevate your legs above your heart, reducing spinal pressure. Choose from three positions.
- Heat Function: Turn on the lumbar heat for soothing warmth to help relax back muscles.
- Foot Rollers & Airbags: Activate foot rollers for sole stimulation and air compression for arms, calves, and feet to enhance circulation.
- Bluetooth & Speakers: Connect your device via Bluetooth to enjoy music through the integrated HD speakers.

Overview of user-friendly features including the remote control, LED lighting, and quick access buttons on the armrest.

Illustrations of the calves, feet, and waist airbag massage, alongside the lower back heating therapy for targeted relief.
Maintenance
Proper care ensures the longevity and optimal performance of your MYTHIA A303 Massage Chair:
- Cleaning: Wipe clean with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Storage: If storing for an extended period, unplug the chair and cover it to protect from dust.
- Inspection: Regularly check the power cord and connections for any signs of damage.
Troubleshooting
If you encounter any issues with your massage chair, please refer to the following common troubleshooting steps:
- Chair not powering on: Ensure the power cord is securely plugged into both the chair and a working electrical outlet. Check the circuit breaker.
- Massage intensity too weak/strong: Adjust the intensity settings using the remote control. Ensure the body scan has correctly identified your body contours.
- Unusual noises: Turn off the chair and unplug it. Inspect for any obstructions or loose parts. If the noise persists, contact customer support.
- Remote control not responding: Check the batteries in the remote. Ensure there are no obstructions between the remote and the chair's sensor.
Specifications
| Attribute | Detail |
|---|---|
| Brand | MYTHIA |
| Model Name | Mythia A303 |
| Color | A303 Black |
| Product Dimensions | 50.39"D x 29.92"W x 46.46"H |
| Item Weight | 182.6 pounds |
| Maximum Weight Recommendation | 260 Pounds |
| Material | Foam |
| Product Care Instructions | Wipe Clean |
| UPC | 850036151449 |
Warranty and Support
MYTHIA is committed to providing quality products and excellent customer service.
- Warranty: MYTHIA stands by its commitment to reliability through a 3-Year Expert Support. Please refer to your purchase documentation for specific warranty terms and conditions.
- Returns: This product is eligible for 30-day easy returns.
- Customer Support: For any inquiries, technical assistance, or warranty claims, please contact MYTHIA customer support. Refer to the contact information provided with your purchase or visit the official MYTHIA website.