ROCKBYE SF31 Smart Bicycle Taillight with Turn Signals & Anti-Theft Alarm

Six lighting modes, wireless turn signals, smart brake sensing, and bicycle security—all in one rechargeable rear light.

Upgrade your bicycle with the ROCKBYE SF31 Smart Bicycle Taillight, a multifunctional rear lighting system designed for cycling visibility, convenient signaling, and added theft deterrence.

Combining LED turn signals, a 110dB anti-theft alarm, an electric horn, intelligent brake sensing, and wireless handlebar controls, the SF31 offers a practical solution for daily commuting, recreational cycling, and bicycle touring.

Key Features

• Wireless Left & Right Turn Signals: Communicate your intended direction using bright rear indicators operated from the handlebar-mounted remote.

• 110dB Anti-Theft Alarm: A vibration-sensitive alarm sounds when movement is detected while the security function is armed, helping deter unauthorized handling.

• Smart Brake Sensing: Intelligent sensing activates enhanced rear lighting during detected braking activity.

• 6 LED Lighting Modes: Choose from multiple lighting patterns, including flashing, breathing, and blinking modes.

• Wireless Handlebar Remote: Conveniently operate turn signals, lighting functions, the electric horn, and the security alarm without reaching behind the bicycle.

• Integrated Electric Horn: Provides an audible warning to help alert nearby pedestrians and other road users.

• USB Rechargeable Battery: Built-in rechargeable power eliminates the need for disposable batteries.

• IPX5 Water Resistance: Designed to withstand rain and water spray during normal cycling conditions.

• Rear Rack Installation: Designed for compatible bicycle rear racks using the included mounting hardware.

• Durable Construction: Plastic and alloy components designed for everyday outdoor cycling use.

Product Specifications

Compatibility Note: Verify your bicycle's rear rack dimensions and mounting points before purchasing. This product is designed for rear rack installation rather than standard seatpost mounting.

Package Includes

• 1 × ROCKBYE SF31 Smart Bicycle Taillight

• 1 × Wireless Remote Control

• 1 × Handlebar Remote Mount

• 1 × Rear Rack Mounting Bracket

• 1 × Set of Installation Screws and Washers

• 1 × Allen Key

• 1 × USB Charging Cable

• 1 × User Manual

Additional Bicycle Security

The integrated vibration-sensitive anti-theft alarm provides an additional layer of theft deterrence when your bicycle is parked.

When armed, the alarm is designed to activate upon detecting unauthorized movement or vibration.

Important: The alarm is a supplementary security feature and should not replace a properly secured bicycle lock.

Designed for Everyday Cycling

Whether you're commuting through city streets, enjoying recreational rides, or traveling longer distances, the ROCKBYE SF31 combines rear visibility, directional signaling, and convenient wireless operation.

Its rechargeable design and multifunctional features make it a practical accessory for cyclists seeking additional lighting and security capabilities.

ROCKBYE SF31 — Smart Lighting, Convenient Signaling, and Added Bicycle Security.