Introduction
The Felix FL598 Smarta Digital Body Fat and Water Scale is designed to provide accurate measurements of your body weight, body fat percentage, and body water percentage. This manual will guide you through the proper use and care of your scale to ensure optimal performance and longevity. For best results, please read these instructions carefully before first use.

Image 1: Full view of the Felix FL598 Smarta Digital Body Fat and Water Scale.
Package Contents
Upon unpacking, please ensure all items listed below are present and in good condition:
- Felix FL598 Smarta Digital Body Fat and Water Scale
- User Manual
- Warranty Certificate
Safety Information
To ensure safe and accurate use of your scale, please observe the following safety precautions:
- Always place the scale on a hard, flat, and stable surface. Avoid carpets or uneven floors, as this can significantly affect accuracy.
- Do not use the scale on wet or slippery surfaces to prevent falls.
- The scale is designed for personal use and should not be used for commercial purposes or medical diagnosis. Consult a healthcare professional for medical advice.
- Keep the scale away from water and extreme temperatures.
- Do not disassemble or attempt to repair the scale yourself. Contact authorized service personnel for assistance.
- Keep batteries out of reach of children.
- Individuals with pacemakers or other internal medical devices should not use the body fat/water measurement function. Consult your doctor if you have concerns.
- Do not jump on the scale.
Setup
1. Battery Installation
- Open the battery compartment cover located on the underside of the scale.
- Insert the required batteries (e.g., 2 x AAA, not included) according to the polarity indicators (+/-).
- Close the battery compartment cover securely.
2. Initial Calibration
- After installing batteries, place the scale on a hard, flat surface.
- Briefly step on the scale, then step off. The display will show '0.0' or similar, indicating it is ready for use. This process calibrates the scale.
3. Unit Selection
Locate the unit switch (often on the underside of the scale or near the battery compartment). Toggle it to select your preferred unit of measurement between kilograms (kg) and pounds (lb).
4. User Profile Setup (for Body Fat/Water Measurement)
To utilize the body fat and water measurement functions, you must set up a user profile. This typically involves entering your gender, height, and age. The scale can store multiple user profiles (e.g., P1-P10).
- Press the 'SET' button. The display will show a user number (e.g., P1).
- Use the 'UP' and 'DOWN' arrow buttons to select your desired user number.
- Press 'SET' again to confirm the user number.
- The display will prompt you to enter gender (e.g., Male/Female icon). Use arrow buttons to select and 'SET' to confirm.
- Repeat for height (cm/inch) and age (years). Confirm each setting with 'SET'.
- Once all profile details are entered, the scale is ready for body composition measurement for that user.

Image 2: Close-up view of the scale's digital display and control buttons (SET, UP, DOWN).
Operating Instructions
1. Basic Weight Measurement
- Place the scale on a hard, flat surface.
- Gently step onto the scale with bare feet. Stand still and centered on the scale.
- Your weight will be displayed. Wait for the reading to stabilize.
- Step off the scale. The reading will hold briefly before the scale turns off automatically.
2. Body Composition Measurement (Body Fat & Water)
This function requires bare feet to make proper contact with the metal electrodes on the scale surface. Ensure your user profile is correctly set up before proceeding.
- Select your user profile by pressing the 'SET' button and using the arrow keys to navigate to your profile number (e.g., P1).
- With bare feet, step onto the scale. Ensure your feet are positioned correctly on the metal electrodes.
- The scale will first display your weight, then cycle through your body fat percentage and body water percentage. It may also display other metrics if available (e.g., muscle mass, bone mass).
- Wait for all measurements to be displayed. The scale will typically beep or flash when measurements are complete.
- Step off the scale. The display will turn off automatically after a few seconds.

Image 3: The scale's display showing a weight reading and the Felix logo. Note the maximum capacity of 150kg.
Maintenance and Care
Cleaning
Wipe the scale surface with a soft, slightly damp cloth. Do not use abrasive cleaners, chemical solvents, or immerse the scale in water. Ensure the surface is dry before storage or next use.
Storage
Store the scale in a cool, dry place, away from direct sunlight, extreme temperatures, and high humidity. Avoid placing heavy objects on the scale when not in use.
Battery Replacement
When the display shows 'Lo' or becomes dim, it's time to replace the batteries. Follow the battery installation steps outlined in the 'Setup' section. Dispose of old batteries responsibly according to local regulations.

Image 4: Side view of the Felix FL598 Smarta Digital Scale, highlighting its slim design.
Troubleshooting
If you encounter any issues with your scale, please refer to the following table for common problems and solutions:
| Issue | Possible Cause / Solution |
|---|---|
| Display shows 'Lo' | Low battery. Replace the batteries as described in the 'Battery Installation' section. |
| Display shows 'Err' | Overload or measurement error. Step off the scale and try again. Ensure your weight does not exceed the maximum capacity of 150 kg (330 lb). |
| Inaccurate weight readings | Ensure the scale is on a hard, flat, and stable surface. Recalibrate by briefly stepping on and off the scale. Avoid moving the scale between measurements. |
| Body fat/water measurement not working | Ensure bare feet are making good, direct contact with the metal electrodes. Check that your user profile settings (gender, height, age) are correct. Ensure your feet are clean and dry. This function is not suitable for individuals with pacemakers or other internal medical devices. |
| Scale does not turn on | Check if batteries are inserted correctly with correct polarity. Replace batteries if they are old or depleted. |
Specifications
- Product Name: Felix Smarta Digital Body Fat and Water Scale
- Model Number: FL598
- Brand: Felix
- Manufacturer: Arzum
- Maximum Capacity: 150 kg (330 lb)
- Measurement Increments: 100 g (0.2 lb)
- Units: Kilograms (kg), Pounds (lb)
- Weight: 1.74 kg
- Package Dimensions: 35 x 33 x 25 cm
- First Available Date: January 11, 2018
- Country of Origin: China
Warranty and Support
Your Felix FL598 Smarta Digital Body Fat and Water Scale comes with a warranty certificate. Please refer to the certificate for detailed information regarding warranty coverage, terms, and conditions.
For technical support, service, or any product-related inquiries, please contact your retailer or the manufacturer, Arzum, through their official customer service channels. Please have your model number (FL598) and purchase information ready when contacting support.