Rear Bike Light Alarm Arruzzo L47I — anti-theft tail light with remote control

Arruzzo L47I is a combined rear bike light with an integrated anti-theft alarm and remote control. It mounts to the bicycle’s rear and offers brake light functionality, multiple lamp modes for visibility, and an audible alarm to deter theft. The unit includes two adapters for mounting on a seatpost or a flat surface and is rated IP65 for outdoor use.

Advantages

The Arruzzo L47I combines a rear brake light, multi-mode lamp and anti-theft siren in a single compact device, reducing the need for separate accessories. It features automatic night activation, adjustable alarm sensitivity and three volume levels, plus a remote control that operates at up to 10–50 m. The device is built to withstand typical outdoor conditions and a wide temperature range.

Suitable for

• Urban commuting and everyday cycling
• Short stops where quick temporary security is needed
• Riders who want both improved visibility and theft deterrence

When it may not be suitable

The unit is intended as a theft deterrent for quick stops and for improving visibility; it is not a substitute for a robust physical lock for long-term or high-risk parking. Remote range can vary between about 10 and 50 metres depending on environment and interference.

Key specifications

• Functions: brake light, 4 lamp modes, anti-theft alarm, bell
• Automatic light activation when riding at night
• Alarm volume: 110 dB
• Alarm sensitivity: 7 adjustable levels
• Volume control: 3 levels
• Remote control operating range: 10–50 m
• Power: 700 mAh 3.7 V internal alarm battery; remote uses 27A 12 V battery
• Operating frequency: 433.92 MHz
• Ingress protection: IP65
• Operating temperature range: -40 °C to +70 °C
• Includes two mounting adapters for round posts and flat surfaces

How to use

Mount the Arruzzo L47I to the bicycle using the appropriate adapter for a seatpost or a flat rack. Charge or ensure the internal alarm battery is charged and insert the battery into the remote control. Use the lamp modes and brake light as needed while riding; enable automatic night activation to switch on the light after dusk. Arm the alarm via the remote before leaving the bike unattended and adjust sensitivity or volume to your preference. Test the alarm and remote function at a short distance to confirm correct operation.

What to consider before purchase

• Intended use: short-term deterrent vs. long-term secure locking
• Required remote range in your typical environment (10–50 m is typical)
• Compatibility with your bike’s mounting location and tube diameter
• Battery types and replacement/charging requirements

Usage recommendations

For best results, combine the Arruzzo L47I alarm with a sturdy physical lock when leaving your bicycle for extended periods. Keep the remote battery fresh and periodically check mounting hardware and seals to maintain IP65 protection.