1. Product Overview
The CYCLAMI CY200 is an intelligent bicycle rear light designed to enhance cycling safety. It features smart brake sensing, automatic start/stop functionality, and multiple lighting modes, all housed in a compact and waterproof design.

Key Features:
- Intelligent Brake Sensing: Automatically switches to high brightness for 5 seconds upon braking.
- Automatic Start/Stop: Wakes up with vibration and automatically shuts down after 30 seconds of inactivity.
- High Brightness: Equipped with 14 high-brightness LED beads, providing 200 lumens output.
- Multiple Lighting Modes: Offers 20 different light combinations for various riding conditions.
- Compact & Lightweight: Weighs only 34g with an ABS housing.
- IPX6 Waterproof: Designed to withstand rain and splashes.
- Type-C Charging: Convenient and fast charging with a 600mAh battery.
2. Package Contents
Please check the package for the following items:

- CYCLAMI CY200 Bicycle Tail Light (1 unit)
- Bicycle Cushion Stands / Mounting Bracket (1 unit)
- USB Type-C Charging Cable (1 unit)
- Hexagonal Wrench (1 unit)
- Zip Ties (multiple)
3. Setup and Installation
The CYCLAMI CY200 offers easy installation with dual stand options for seat bow or seatpost mounting.
3.1 Mounting Options

- Seat Bow Installation: Attach the provided mounting bracket directly under your bicycle seat rails. Secure it using the hexagonal wrench if needed, or zip ties for a firm fit.
- Seatpost Mounting: For seatpost installation, an optional seatpost holder (not always included, check package) may be required. Secure the bracket to the seatpost using zip ties or the appropriate clamp.
Ensure the light is securely fastened and facing directly backward for optimal visibility.
4. Operating Instructions
The CYCLAMI CY200 features intuitive controls for power and lighting modes.
4.1 Power On/Off
- Power On: Press and hold the power button (located on the side of the light) for approximately 2-3 seconds until the light illuminates.
- Power Off: Press and hold the power button for approximately 2-3 seconds until the light turns off.
4.2 Automatic Start/Stop Function
The light is equipped with an intelligent motion sensor:
- Automatic Start: The light will automatically turn on when it detects vibration or movement.
- Automatic Shutdown: If the light remains still for 30 seconds, it will automatically shut down to conserve battery.

4.3 Lighting Mode Selection
The CY200 offers a variety of lighting modes controlled by the power button. The light has two main light components: an inner ring light and an outer ring light.
- Inner Ring Light Control: Single-click the power button to cycle through modes for the inner ring light.
- Outer Ring Light Control: Double-tap the power button to cycle through modes for the outer ring light.
The light offers 20 combinations, including modes like Medium Bright, Low Bright, Running Light, Starlight Flash, Alternate Flash, Slow Flash, and Fast Flash, with options to have either the inner or outer ring (or both) active or off.

4.4 Smart Brake Light Function
When the light detects a deceleration (braking), it will automatically switch to a high-brightness mode for 5 seconds to alert traffic behind you, significantly improving safety.

5. Charging
The CYCLAMI CY200 is equipped with a 600mAh battery and charges via a Type-C port.
5.1 Charging Procedure
- Locate the Type-C charging port on the side of the tail light.
- Connect the provided USB Type-C cable to the light and to a standard USB power source (e.g., computer, wall adapter).
- The charging indicator light will show the charging status.
5.2 Charging Indicators

- Flashing Red Light: Indicates the battery is currently charging.
- Solid Green Light: Indicates the battery is fully charged.
A full charge typically takes approximately 1.5 hours.
6. Maintenance
To ensure the longevity and optimal performance of your CYCLAMI CY200 tail light, follow these maintenance guidelines:
- Cleaning: Wipe the light with a soft, damp cloth to remove dirt and debris. Avoid using harsh chemicals or abrasive materials.
- Water Resistance: The light is IPX6 waterproof, meaning it is protected against powerful water jets. However, avoid submerging it in water for extended periods. Ensure the Type-C port cover is securely closed when not charging to maintain water resistance.
- Storage: Store the light in a cool, dry place when not in use. If storing for an extended period, charge the battery to about 50% to prolong its lifespan.
- Battery Care: Avoid fully discharging the battery frequently. Recharge promptly when the low battery indicator appears.
7. Troubleshooting
Here are solutions to common issues you might encounter:
| Problem | Possible Cause | Solution |
|---|---|---|
| Light does not turn on. | Battery is depleted. Power button not pressed correctly. | Charge the light for at least 1.5 hours. Press and hold the power button for 2-3 seconds. |
| Light does not charge. | Faulty cable or power source. Charging port obstructed. | Try a different USB Type-C cable and power adapter. Ensure the charging port is clean and free of debris. |
| Automatic shutdown occurs too quickly or not at all. | Constant vibration detected. Sensor malfunction. | Ensure the light is mounted securely to minimize false vibration readings. The auto-shutdown activates after 30 seconds of stillness. If it's constantly vibrating, it won't turn off. |
| Brake sensing not working. | Sensor obstruction or malfunction. | Ensure the light is clean and nothing is blocking the sensor area. Test by simulating a quick stop. |
If the problem persists, please refer to the Warranty and Support section.
8. Specifications

| Feature | Detail |
|---|---|
| Brand | CYCLAMI |
| Model Name | CY200 Smart Sensor Brake Tail Light |
| Body Material | ABS Plastic |
| Battery Capacity | 600mAh, 3.7V |
| Charging Type | Type-C USB |
| Charging Time | Approx. 1.5 hours |
| Weight | 34g |
| Dimensions (LxWxH) | 57mm x 35mm x 25mm |
| Waterproof Level | IPX6 |
| Lighting Modes | 20 combinations including Medium Bright, Low Bright, Running Light, Starlight Flash, Alternate Flash, Slow Flash, Fast Flash. |
| Intelligent Sensing | Brake Sensing, Automatic Start/Stop |
| Certification | CE, FCC, RoHS |
9. User Tips
Based on common user inquiries and feedback, here are some tips for getting the most out of your CYCLAMI CY200:
- Daylight Mode: To use the light during the day, simply power it on and select your preferred mode. The high brightness and various flash patterns are effective for daytime visibility.
- Managing Auto-Off: The automatic shutdown feature is designed to save battery. If you prefer the light to stay on constantly, ensure there is continuous movement or vibration. There is no direct option to disable the auto-off feature, as it's integral to the smart sensing.
- Battery Life: While the 600mAh battery provides good daily use, frequent use of high-brightness or complex flashing modes will consume more power. Consider using lower brightness or steady modes for longer rides.
- Mounting Stability: Ensure the light is mounted very securely. Loose mounting can lead to inaccurate brake sensing or accidental mode changes due to excessive vibration.
10. Warranty and Support
For any issues not covered in this manual, or for warranty claims, please contact the seller or manufacturer's customer support. Keep your proof of purchase for warranty purposes.
A detailed user manual in PDF format may be available for download. Please refer to the product page or manufacturer's website for the latest version. (Reference: User manual (PDF))





