Introduction
This manual provides comprehensive instructions for the safe and effective use of your TOWILD TL03 Smart Brake Sensing Rechargeable Bike Tail Light. Please read this manual thoroughly before operating the device and retain it for future reference. The TL03 is designed to enhance cyclist visibility and safety with its bright LEDs, smart sensing capabilities, and durable, waterproof construction.

Image: The TL03 tail light providing visibility for cyclists in various environments including commuting, road cycling, and outdoor cycling.
Product Overview
The TOWILD TL03 is a compact and intelligent bike tail light featuring advanced safety functions. Its design prioritizes visibility, durability, and ease of use for all cycling conditions.
Key Features:
- Smart Brake Sensing: Automatically increases brightness upon deceleration to alert traffic.
- High Visibility: 16 bright LEDs provide visibility up to 328 feet.
- IPX6 Waterproof: Ensures reliable operation in various weather conditions, including rain and fog.
- Long Battery Life: 400mAh rechargeable battery offers up to 36 hours of runtime in flash mode.
- Type-C Fast Charging: Fully charges in approximately 1.5 hours.
- Automatic On/Off: Features vibration and light sensors for intelligent power management.
- Multiple Lighting Modes: Six distinct flash modes to suit different riding preferences and conditions.
- Compact and Lightweight: Weighs only 19.6g, making it easy to carry and less prone to theft.
- Easy Installation: Quarter-lock mounting system for quick attachment and removal.

Image: The TOWILD TL03 tail light, highlighting its circular LED array and compact form factor.

Image: The TL03 tail light ensuring high visibility for a cyclist at night, demonstrating its wide field of view and effective range.
Components:
- TOWILD TL03 Bike Tail Light
- Mounting Bracket
- USB-C Charging Cable
- Anti-slip Mat
- Rubber Rings (2 sizes)
- Ties (for mounting)
- User Manual

Image: A visual representation of all items included in the TOWILD TL03 product package.

Image: The complete packing list for the TL03, detailing each component provided with the product.
Setup
1. Charging the Device
Before first use, fully charge the TL03 tail light. The device features a 400mAh battery and charges via a Type-C USB cable.
- Locate the hidden Type-C charging port on the device.
- Connect the provided USB-C cable to the tail light and a suitable USB power source (e.g., computer, wall adapter).
- Charging typically takes approximately 1.5 to 2 hours for a full charge.
- The battery indicator lights will show charging progress and current battery level.

Image: The TL03 tail light being charged via USB-C, illustrating the battery level indicators.

Image: Information on the TL03's Type-C fast charging capability and its extended battery life.

Image: The TL03 tail light during charging, emphasizing its long battery life and providing a table of operating times for different lighting modes.
2. Installation
The TL03 features a quarter-lock mounting system for easy and secure attachment to your bicycle's seatpost or saddle.
- Select the appropriate rubber ring size for your seatpost.
- Place the anti-slip mat on the seatpost to prevent movement.
- Secure the mounting bracket to your seatpost using the rubber rings or ties. Ensure it is firmly attached and does not obstruct other bike components.
- Align the TL03 tail light with the mounting bracket and twist it into place until it locks securely. The quarter-lock mechanism allows for quick attachment and removal.
- Verify that the light is stable and facing directly backward for optimal visibility.

Image: Demonstrating the tool-free installation of the TL03 tail light on a bike's seatpost.
Operating Instructions
1. Power On/Off
- To power on or off the tail light, press and hold the power button for 0.5 seconds.
2. Switching Lighting Modes
The TL03 offers five distinct lighting modes. Once the tail light is on, cycle through the modes with a single click of the power button.
- Variable Frequency Flashing (Operating time: 36h)
- Rotating Flash (Operating time: 30h)
- Breathing Flash (Operating time: 30h)
- Single Flash (Operating time: 32h)
- Always On (Operating time: 18h)

Image: A table detailing the five lighting modes and their estimated battery runtimes. Note that brake sensing can affect runtime.
3. Smart/Manual Mode Switching
- When the power is turned on, double-click the power button to switch between Smart Mode and Manual Mode.

Image: A summary of the TL03's operational controls, including how to switch between Smart and Manual modes.
4. Smart Features
Brake Sensing:
The TL03 is equipped with a smart brake sensing function that automatically increases the light's brightness to full for 1 second when deceleration is detected, acting as a brake light.
- To turn off the brake sensing function: When the lights are on, press and hold the button for 3 seconds. The indicator light will blink 3 times, confirming the function is off.
- To turn on the brake sensing function: When the lights are on, press and hold the button again for 3 seconds. The indicator light will blink 3 times, confirming the function is on.

Image: Visual demonstration of the brake sensing feature and instructions for disabling it.

Image: The TL03's brake sensing feature, with instructions for manual activation and deactivation to conserve battery.
Light Sensing:
In Smart Mode, the built-in light sensor automatically turns the tail light on when surroundings are dark and off when they are bright, optimizing battery usage.

Image: The TL03's light sensing feature, which automatically adjusts the light based on ambient brightness.

Image: The TL03's light sensing capability, showing how it adapts to changing light conditions.
Vibration Sensing:
In Smart Mode, a built-in vibration sensor detects movement. If no vibration is detected for 120 seconds (2 minutes), the light will automatically turn off to save battery. It will turn on again automatically when vibration is detected.

Image: The TL03's vibration sensing feature, demonstrating its automatic on/off functionality based on movement.
5. Battery Level Indication
To check the remaining battery level, press the power button briefly. Four indicator LEDs will illuminate, each representing 25% of the battery capacity.
- 1 LED: 0-25% remaining
- 2 LEDs: 25-50% remaining
- 3 LEDs: 50-75% remaining
- 4 LEDs: 75-100% remaining

Image: The battery level indicators on the TL03, showing how each illuminated LED corresponds to a 25% charge increment.
Maintenance
Cleaning:
Wipe the tail light with a soft, damp cloth to remove dirt and debris. Avoid using harsh chemicals or abrasive materials that could damage the casing or lens.
Storage:
Store the device in a cool, dry place when not in use. For long-term storage, ensure the battery is partially charged (around 50%) to prolong its lifespan. Recharge every few months if stored for extended periods.
Waterproofing:
The TL03 is rated IPX6 waterproof, meaning it is protected against high-pressure water jets from any direction. This makes it suitable for use in rainy conditions. Ensure the charging port cover is securely closed to maintain its waterproof integrity.

Image: The TL03 tail light enduring water splashes, highlighting its IPX6 waterproof and dustproof capabilities.

Image: The TL03's robust IPX6 waterproof design, ensuring functionality even in adverse weather.
Troubleshooting
- Light not turning on: Ensure the battery is charged. Press and hold the power button for 0.5 seconds to turn on.
- Brake sensing not working: Ensure the brake sensing function is enabled (refer to Operating Instructions).
- Light turns off unexpectedly: In Smart Mode, the light will turn off after 120 seconds of no vibration. Check if the vibration sensor is active. Ensure the battery is not depleted.
- Short battery life: Operating time varies by mode. Constant braking with brake sensing enabled can reduce battery life. Ensure the device is fully charged before use.
Specifications
| Feature | Detail |
|---|---|
| Model | TL03 |
| Brand | TOWILD |
| Material | Plastic |
| Power Source | Battery Powered (400mAh) |
| Water Resistance Level | IPX6 Waterproof |
| Item Weight | 0.7 Ounces (approx. 19.8g) |
| Mounting Type | Seatpost Mount |
| Number of Settings | 5 Lighting Modes |
| Charging Time | Approx. 1.5 - 2 hours (Type-C USB) |
| Max Runtime | Up to 36 hours (in Variable Frequency Flashing mode) |
| Dimensions (LxWxH) | 1.89 x 1.77 x 1.5 inches |

Image: Detailed dimensions of the TL03 tail light.
Warranty and Support
Warranty Information:
The TOWILD TL03 Smart Brake Sensing Rechargeable Bike Tail Light comes with a 2-year warranty from the date of purchase. This warranty covers manufacturing defects and ensures the product performs as described under normal use. Please retain your proof of purchase for warranty claims.
Customer Support:
For any questions, technical assistance, or warranty claims, please contact TOWILD customer support. You can find contact information on the official TOWILD website or through your retailer.
Official Product Video
Video: An official product video demonstrating the features and operation of the TOWILD TL03 Bike Tail Light, including its various lighting modes, brake sensitivity, and automatic on/off function.





