GIYO Bicycle Rear Light GL-09 / GL09S User Manual

1. Introduction

Thank you for choosing the GIYO Bicycle Rear Light. This manual provides essential information for the safe and efficient use of your GL-09 or GL09S rear light. Please read it thoroughly before installation and operation.

Figure 1: GIYO Intelligent Brake Tail Lamp highlighting key features.

2. Specifications

The GIYO Bicycle Rear Light is available in two models: GL-09 and GL09S. Both models share core features, with the GL09S offering advanced intelligent functions.

Note: Runtime varies based on the selected light mode. The GL09S model features intelligent sensing and brake sensing capabilities.

Figure 2: Detailed usage times for GL-09 and GL09S models per light mode.

3. Setup and Installation

The GIYO Bicycle Rear Light offers versatile installation options for both saddle and seatpost mounting.

3.1. Installation on Cushion Support (Saddle)

1. Fix and tie both ends of the saddle bracket under the cushion with a tie.
2. Put the tail lamp into the saddle bracket and rotate it 90 degrees to secure.
3. Ensure the light is firmly attached and facing directly backward.

Figure 3: Step-by-step guide for saddle installation.

3.2. Installation on Seat Post

1. Fix the seat post bracket on the seat post with a strap.
2. Put the tail lamp into the seat post bracket and rotate it 90 degrees to secure.
3. Verify the light is stable and correctly oriented.

Figure 4: Step-by-step guide for seat post installation.

Important: Ensure the light is installed correctly and securely. The light should be positioned vertically for optimal brake sensing functionality (GL09S model). Refer to the video for visual guidance.

Figure 5: Correct mounting angle for brake sensing functionality.

4. Operating Instructions

4.1. Power On/Off and Mode Selection

After power on, click the button to switch between the 6 available light modes:

• Always bright
• Respiratory flash
• Slow flash
• Rhythmic flash
• Endurance flash
• Fast flash

Figure 6: Visual representation of the 6 light modes.

4.2. Intelligent Mode (GL09S Only)

The GL09S model features an intelligent mode for automatic operation. Double-click the power button to activate intelligent mode. Click once for normal mode.

• Automatic Wakeup: In dim light conditions, the lamp will automatically turn on when cycling.
• Automatic Sleep: When the light ray is bright, the lamp will turn off. If cycling stops in dim light, the lamp will turn off after 45 seconds.
• Brake Sensing: When deceleration is detected during cycling, the light will highlight for 3 seconds to warn others.

Figure 7: Intelligent mode automatic functions explained.

Figure 8: High precision intelligent induction chip for accurate brake detection.

5. Maintenance

5.1. Charging

The GIYO Bicycle Rear Light features Type-C fast charging. A full charge typically takes 2 hours.

• Connect the light to a 5V USB power source using a Type-C cable.
• Click the button when the power is off to display the current power level:
• Green: More than 80%
• Blue: 30%-80%
• Red: Less than 30%

Figure 9: Type-C fast charging and power indicator.

5.2. Cleaning and Storage

• Wipe the light with a soft, damp cloth to remove dirt and debris. Do not use harsh chemicals.
• Ensure the Type-C charging port cover is securely closed to maintain IP66 waterproof rating.
• Store the light in a cool, dry place when not in use.

6. Troubleshooting

• Light not turning on: Ensure the battery is charged. Press and hold the power button for a few seconds to turn it on.
• Light not responding to intelligent mode (GL09S): Check if intelligent mode is activated (double-click). Ensure the light is mounted vertically for proper sensor function.
• Brake sensing not working (GL09S): Verify the light is securely mounted and oriented correctly. Sudden deceleration is required to trigger the brake light.
• Short battery life: Ensure the light is fully charged. Consider using lower power modes for extended runtime.

7. User Tips

• For maximum visibility, especially in low-light conditions, consider using the 'Always bright' or 'Fast flash' modes.
• Regularly check the battery level, especially before long rides, to ensure continuous operation.
• When installing the GL09S, pay close attention to the vertical alignment to ensure the brake sensing feature works optimally.

8. Warranty and Support

This product is covered by a warranty against manufacturing defects. For specific warranty terms and conditions, please refer to the seller's policy or contact customer support.

Fast Delivery Guarantee: If your delivery is delayed, you may be eligible for a coupon. Refunds are available if the package is lost or items are damaged during transit. Full refunds are also provided if no delivery occurs within 30 days.

Free Returns: You may be eligible for free returns within 90 days of purchase. Please check the seller's return policy for details.