1. Introduction
Welcome to the user manual for your Fitdays Smart Body Tape Measure. This innovative device is designed to help you accurately track your body measurements and progress towards your fitness and health goals. By seamlessly integrating with the Fitdays App, it provides a convenient and efficient way to monitor changes in your body composition over time.
2. Product Overview
The Fitdays Smart Body Tape Measure combines traditional measurement with smart technology for enhanced tracking.
Key Features:
- Smart Connectivity: Pairs with the Fitdays App via Bluetooth for automatic data synchronization.
- Accurate & Easy Read: Features a large LED HD display for clear readings and a built-in smart chip for precise measurements.
- Auto-Retract & Easy-Lock Hook: Designed for convenient self-measurement and compact storage.
- Multi-functional Tracking: Capable of tracking 12 key body parts including biceps, calves, hips, thighs, waist, shoulders, bust, neck, and abdomen.
- Family-Friendly: Supports multiple user profiles within the Fitdays App, making it suitable for families or training teams.
- Long-lasting Battery: Equipped with a rechargeable Type-C battery.

Figure 1: Fitdays Smart Body Tape Measure and its companion app.

Figure 2: Detailed view of the tape measure's features including the LED display, durable tape, and Type-C charging port.
3. Setup
3.1 Download the Fitdays App
The Fitdays Smart Body Tape Measure works in conjunction with the Fitdays App. Download the app from your device's app store:
- App Store (iOS): Search for "Fitdays"
- Google Play (Android): Search for "Fitdays"
- Alternatively, visit the official Fitdays website: http://www.fitfeel.cn/fitdays/

Figure 3: Download the Fitdays App from your preferred app store.
3.2 Bluetooth Pairing
- Ensure your smartphone's Bluetooth is turned on.
- Open the Fitdays App and navigate to the device pairing section.
- Press the power button on the Smart Body Tape Measure to turn it on. The display will light up.
- The app should automatically detect the device. Follow the on-screen prompts in the app to complete the pairing process.
Video 1: Demonstration on how to use the smart tape measure, including pairing with the app.
Video 2: Overview of the body measuring tape's features and basic operation.
Video 3: Detailed demonstration of the smart body measuring tape's functionalities.
4. Operating Instructions
4.1 Taking Measurements
- Extend the Tape: Press the button on the side of the device to release the tape.
- Position the Hook: Place the easy-lock hook into the slot on the side of the device to form a loop.
- Measure: Wrap the tape around the body part you wish to measure (e.g., waist, arm, thigh). Ensure the tape is snug but not too tight.
- Tighten: Press the white button on the top of the device to automatically tighten the tape for an accurate reading.
- Read Display: The measurement will be shown on the large LED HD display.
- Retract: Press the button on the side again to retract the tape for storage.
4.2 Switching Units
The device supports both inches (in) and centimeters (cm). To switch between units, press the 'M' button (usually the left button) on the device. The display will update to show the current unit.
4.3 Saving Data to App
Once a measurement is taken and displayed on the device, ensure your device is connected to the Fitdays App via Bluetooth. The measurement will automatically sync to the app. You can then select the specific body part (e.g., L:Arm, Waist, Hip) in the app to assign the measurement. Click 'Save' in the app to record the data.
4.4 App Features for Tracking
- Body Part Tracking: The app allows you to track measurements for 12 different body parts, providing a comprehensive overview of your body transformation.
- Progress Visualization: View your measurement history through clear and simple graphs (daily, weekly, monthly, yearly) to track trends and progress.
- Multiple User Profiles: Create and manage up to 8 user profiles, making it easy for the whole family to track their individual progress.
- Body Shape Analysis: The app can help identify your body shape based on your measurements, assisting in garment selection.
- Waist-to-Hip Ratio: Automatically calculates and visualizes your waist-to-hip ratio, a key indicator of overall health.
- Baby Mode: Document your baby's growth journey by tracking their measurements.

Figure 4: The Fitdays App supports multiple user profiles for family tracking.

Figure 5: The smart tape measure caters to various user needs, from pregnancy tracking to muscle building and weight loss.

Figure 6: The dedicated 'Baby Mode' in the Fitdays App allows for documenting a baby's growth.

Figure 7: Beyond body measurements, the tape measure can be used for various tasks like measuring shipping boxes or for dressmaking.
5. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or immerse the device in water.
- Battery: The device uses 1 AAA battery (included). Replace when the display indicates low power.
- Storage: Store the tape measure in a cool, dry place away from direct sunlight and extreme temperatures. Ensure the tape is fully retracted before storage.
6. Troubleshooting
- Device not turning on: Check battery level. Ensure the battery is correctly inserted.
- Bluetooth connectivity issues: Ensure Bluetooth is enabled on your phone. Restart both the tape measure and the Fitdays App. Make sure the device is within range of your phone.
- Inaccurate readings: Ensure the tape is flat against the skin and not twisted. Make sure the hook is securely fastened in the slot.
- App not syncing data: Verify Bluetooth connection. Check if the app has necessary permissions on your phone. Restart the app.
7. Specifications
| Attribute | Detail |
|---|---|
| Product Dimensions | 2.95 x 2.64 x 0.04 inches; 3.53 ounces |
| Item Model Number | ER307UWB |
| Batteries | 1 AAA batteries required (included) |
| Manufacturer | HAIZHIHUI |
| Item Weight | 100 Grams |
| Blade Length | 60 Inches |
| Measurement Accuracy | ±0.118 inches or ±3/32 |
8. Warranty and Support
The SUNHAIXIA Smart Body Tape Measure comes with a 1-year warranty. Our customer support team is dedicated to providing you with satisfactory solutions for any issues you may encounter.
For support, please contact the seller, LEISHENG SPORT, through your purchase platform or refer to the contact information provided with your product packaging.