KEVANLY LED Knight Cycling Backpack User Manual

1. Product Overview

The KEVANLY LED Knight Cycling Backpack is a versatile and innovative backpack designed for cyclists and motorcyclists. It features a flexible high-definition LED display panel that can be customized via a mobile application, allowing for personalized text, patterns, and dynamic animations. The backpack is wear-resistant, waterproof, and offers expandable storage, making it suitable for daily travel and outdoor activities.

Figure 1: LED Knight Cycling Backpack with app control and display examples.

Product Features:

• Flexible high-definition LED display panel.
• Bluetooth connectivity for mobile APP control.
• Customizable text, patterns, and dynamic animations.
• Adjustable brightness and playback speed.
• Wear-resistant and waterproof backpack body.
• Expandable storage capacity, suitable for helmets and laptops.
• Thickened shoulder straps with breathable mesh and chest strap for comfort.

2. Setup and Installation

2.1 Charging Operation

1. Connect a 5V/2A charging head (or a computer/car USB port) to the backpack's charging port using a standard USB charging cable.
2. The indicator light on the backpack will remain on during charging.
3. Once fully charged, the indicator light will turn off. Disconnect the power supply promptly.

2.2 Power On and Bluetooth Connection

1. Lightly press the power button located on the side of the backpack to turn on the device. The LED screen will light up.
2. Enable Bluetooth on your mobile phone.
3. Scan the QR code provided in the physical backpack manual to download the exclusive application.
4. Open the downloaded app and search for the device model to complete Bluetooth pairing.

2.3 Initial Setup Video

3. Operating Instructions

3.1 Content Editing and Display

1. Open the exclusive mobile application.
2. Select from built-in templates or customize your own text, patterns, or animations.
3. After editing, click "send" within the app to synchronize the content to the backpack's LED screen.
4. Adjust screen brightness, playback speed, and switch between different playback modes directly through the app.
5. Save your preferred settings within the app.

3.2 Expandable Storage

The backpack features a one-piece box design with an expansion capability to provide more space. This allows for convenient storage of items such as full-face helmets, laptops, and other essentials.

Figure 2: Backpack showing its pre-expansion and expanded states, increasing capacity.

3.3 Layered Storage

The internal design includes scientific and reasonable distribution of space, making items easy to access and providing strong storage capabilities for various items.

Figure 3: Internal compartments designed for organized storage of a helmet, laptop, mobile phones, power bank, wallet, and books.

4. Maintenance and Care

4.1 General Precautions

• Keep the device and its cord out of reach of children under 3 years old. Adult supervision is required for children's use to prevent accidental damage or contact with the charging interface.
• Do not use this product for purposes other than its intended use.
• Inspect the product before each use; do not use if damaged.
• Follow installation and operation guidelines to avoid injury.

4.2 Battery Care

• Only use 5V DC/≤2A standard USB interface charging. Prohibit the use of high voltage/high current charging heads to avoid battery damage.
• When the battery is low, charge it in a timely manner.
• If the backpack is not used for a long time, ensure it is fully charged before storage.

4.3 Screen and Backpack Protection

• Avoid contact with sharp objects, strong squeezing, or dropping the LED screen to prevent panel breakage and display malfunctions.
• Keep the backpack away from high temperature exposure, open flames, and corrosive liquids.
• Do not soak the backpack in water. While it is waterproof, take good care of the screen and protect it during rainy conditions.

4.4 Prohibited Actions

• It is prohibited to disassemble or modify the internal batteries and circuits of the backpack.

5. Troubleshooting

5.1 Display Malfunctions

• If the LED display is not functioning correctly, check for any physical damage to the panel. Avoid strong impacts or sharp objects that could cause breakage.
• Ensure the backpack is adequately charged. Low battery can affect display performance.
• Verify the Bluetooth connection with the app. Re-pair if necessary.

5.2 Battery Draining Quickly

• If the battery drains even when turned off, ensure the power button is fully disengaged. Some users have noted that leaving the power bank plugged in might contribute to drain.
• Always disconnect the power bank when not in use or when the backpack is turned off for extended periods.
• Ensure you are using a 5V/2A power supply for charging to optimize battery health.

5.3 App Connectivity Issues

• Ensure your phone's Bluetooth is enabled and the backpack is powered on.
• Close and reopen the app, then attempt to reconnect.
• If issues persist, try restarting both your phone and the backpack.

6. Specifications

Figure 4: Detailed product parameters including dimensions and materials.

6.1 Compliance Information

This product complies with the General Product Safety Regulation (GPSR) of the European Union, the Low Voltage Directive (2014/35/EU), the Electromagnetic Compatibility Directive (2014/30/EU), and the RoHS Environmental Directive (2011/65/EU). The product material is free of harmful substances, and the circuit and electromagnetic compatibility comply with EU standards. The certification documents are authentic and valid.

7. Warranty and Support

7.1 Manufacturer and EU Representative Information

• Manufacturer: Guangzhou Kejie Trading Co., Room 302, No. 10, Ou Gang North Street, Ke Mu Long West Road, Tianhe District, Guangzhou City, Guangdong Province, China. Email: kejiezy@163.com
• EU Authorized Representative: SUCCESS COURIER SL, Calle de RIO TORMES 13A, oficina 1, Fuenlabrada, Madrid, 28947 Spain. Email: successservice2@hotmail.com

7.2 Important Warnings

Warning: Installation must comply with local vehicle modification regulations. This product cannot replace core vehicle warning/lighting functions. The manufacturer assumes no liability for light damage or vehicle issues resulting from circuit failure or improper installation.

For a detailed user manual in PDF format, please refer to the official document: User Manual (PDF).

8. User Tips

• Enhanced Visibility: The LED display significantly enhances your visibility on the road, especially at night, making you more noticeable to other drivers and improving safety.
• Helmet Compatibility: The expandable design of the backpack allows it to comfortably fit a full-face helmet, making it a practical choice for motorcyclists.
• Battery Management: To prevent unnecessary battery drain, ensure the power bank is unplugged from the backpack when not in use or when the backpack is powered off for extended periods.
• Personalization: Experiment with different eye effects, text, and animations via the app to personalize your backpack and express your style.