1. Introduction
The KEVANLY B3 Smart LED Tail Light is a versatile and intelligent lighting solution designed to enhance visibility and safety for both bicycle and motorcycle riders. Featuring dynamic RGB LED displays, intelligent sensing capabilities, and app control, this device allows for customizable expressions and automatic high-brightness warnings. It can be mounted as a bicycle tail light or on various helmets.
2. Safety Information
- Ensure the device is securely mounted before each use to prevent detachment during riding.
- Do not stare directly into the LED lights when they are active, as this may cause temporary vision impairment.
- Keep the device away from extreme temperatures and direct sunlight for prolonged periods.
- Do not attempt to disassemble or modify the device, as this may void the warranty and pose safety risks.
- Charge the device using the provided data cable and a compatible power source (3.7-5V).
- The device is IPX5 waterproof, meaning it is resistant to water jets, but should not be submerged in water.
3. Package Contents
Please check the box for the following items:
- Smart Tail Light B3 (x1)
- Data Cable (x1)
- Instruction Manual (x1)
- Wrench (x1)
- Bracket Base (x1)
- Helmet Adapter (x1)
- Bicycle Adapter (x1)
4. Product Specifications
| Feature | Specification |
|---|---|
| LED Screen Resolution | 48*15 pixels |
| LED Light Type | Full Color |
| Battery Capacity | 600mAh Li-ion Battery |
| Voltage | 3.7-5V |
| Connection Method | Bluetooth |
| Power Port | Type-C |
| Body Material | Plastic (PC material, scratch & drop resistant) |
| Waterproof Level | IPX5 |
| Dimensions (approx.) | 14.60 cm (5.57 inches) width x 6.30 cm (2.48 inches) height x 4.50 cm (1.77 inches) depth |
| Net Weight (N.W.) | 0.1 KG |
| Gross Weight (G.W.) | 0.2 KG |
Product dimensions diagram:
Image: Product dimensions showing width 14.60cm/5.57inch, height 6.30cm/2.48inch, and depth 4.50cm/1.77inch.
5. Setup and Installation
5.1. Seat Tube Mount (Bicycle)
Follow these steps to install the tail light on your bicycle's seat tube:
- Unscrew the tail light bracket screws.
- Apply glue (not included) according to the seat tube diameter for a secure fit.
- Fix the tail light bracket to the middle of the seat tube.
- Press the clip onto the bracket and rotate clockwise to secure.
- Push the tail light under the clip until it clicks into place.
- The taillights have now been installed.
Image: Six-step diagram illustrating the installation of the tail light on a bicycle seat tube.
5.2. Helmet Mount (Front/Rear)
The quick-release design allows for easy attachment and removal from helmets:
- Remove the separate part of the helmet adapter.
- Peel the tape off the back of the clip. Stick the clip to the helmet, ensuring the logo is facing up.
- Push the tail light down onto the clip until it is securely attached.
- The taillights have now been installed on the helmet.
Image: Four-step diagram illustrating the installation of the tail light on a helmet.
6. Operating Instructions
6.1. Button Functions
- Power On/Off: Press and hold the function button for 3 seconds to power the device on or off. The device will not wake up automatically after being powered off.
- Switch Programs: When the device is on, single-click the function button to cycle through different display programs/modes.
- Display Battery Level: When the device is on, double-click the function button to display the current battery level.
Video: Demonstration of power on/off and cycling through different display modes using the function button.
6.2. Automatic Features
- Smart Brake, Instant Light: The device uses inertial sensing technology to detect sudden braking or steering. When braking is detected, it automatically activates a high-brightness light to warn vehicles behind, enhancing riding safety.
- Auto On/Off: The device will automatically enter sleep mode after 1 minute of inactivity to save power. It will automatically light up and quickly start when vibration is sensed.
Image: A cyclist demonstrating the 'Smart brake, instant light' feature, where the light activates with high brightness upon braking.
Image: The smart tail light demonstrating its 'Auto on/off' feature, showing it in idle sleep mode and then activating upon sensing vibration.
6.3. APP Control Mode
The B3 Smart LED Tail Light supports APP control for advanced customization and operation.
- Download the "LOY" APP: Scan the QR code below to download the application package and install it on your mobile phone.
- Connect via Bluetooth: Once installed, open the app and follow the on-screen instructions to connect to your B3 device via Bluetooth.
- Customize Display: The app features a rich built-in material library, covering categories like dynamic emojis and text, allowing for free switching and display on the LED screen.
- Function Introduction Video: For a detailed guide on Bluetooth connection, installation methods, and function mode switching, scan the QR code below to watch the operation video. This video also covers usage methods and precautions in different scenarios.
Scan for LOY App Download
Scan for Operation Video
Image: Smartphone app interface demonstrating the extensive library of dynamic emojis and text available for display on the tail light.
7. Maintenance
- Cleaning: Wipe the device with a soft, damp cloth. Do not use harsh chemicals or abrasive cleaners.
- Charging: Charge the device regularly, especially if it has not been used for an extended period, to maintain battery health.
- Storage: Store the device in a cool, dry place away from direct sunlight when not in use.
- Water Resistance: While IPX5 rated, avoid prolonged exposure to heavy rain or direct water jets to maximize the lifespan of the device.
8. Troubleshooting
- Device not turning on: Ensure the battery is charged. Press and hold the power button for 3 seconds.
- Lights not changing modes: Single-click the function button to switch modes. If using the app, ensure Bluetooth connection is active.
- App not connecting: Ensure Bluetooth is enabled on your phone and the device is powered on. Try restarting both the app and the device.
- Automatic features not working: Ensure the device is properly mounted and has a clear line of sight for motion detection. Check battery level.
9. User Tips
- For optimal visibility, especially in low-light conditions, consider using a combination of static and dynamic light patterns.
- Experiment with different emoji and text displays via the app to personalize your riding experience and communicate with others on the road.
- Regularly check the mounting bracket for tightness, especially after riding on rough terrain.
10. Warranty and Support
For warranty information or technical support, please refer to the seller's policies or contact the manufacturer directly. Keep your proof of purchase for any warranty claims.
A user manual in PDF format is also available for download. You can find it at the following link: User Manual (PDF).