Antusi Q5 Smart Rear Light

The Antusi Q5 Smart Rear Light is a popular third-party integration for Brompton enthusiasts. While not manufactured directly by Brompton, it has become a staple "super-upgrade" because it fits perfectly into the Brompton aesthetic and solves common lighting issues on folding bikes.

Product Overview: Antusi Q5 Smart Light

The Antusi Q5 is a CNC-machined aluminum smart light that features an integrated accelerometer. It is specifically loved by Brompton riders for its ability to mount directly under the saddle or on the rear rack, maintaining a clean look when the bike is folded.

Core Specifications

Feature	Detail
Material	6061 Aluminum Alloy Chassis
Battery	400mAh Li-ion (USB-C Rechargeable)
Brightness	40 Lumens (High Visibility COB LED)
Waterproofing	IPX6 (Heavy Rain Resistant)
Smart Modes	Auto Start/Stop & Braking Induction
Weight	~55g

Detailed Component Breakdown

1. Intelligent Braking Induction

The standout feature of the Q5 is the built-in accelerometer. When you decelerate, the light automatically switches to a high-intensity "solid" beam for 3 seconds to warn traffic behind you, effectively acting as a car's brake light.

2. Smart Light & Motion Sensing

In "Smart Mode," the light utilizes two sensors:

Light Sensor: It detects ambient light. If it’s bright (daytime), the light stays off. If it’s dark (tunnel/night), it turns on.

Motion Sensor: If the bike stays stationary for more than 60 seconds, the light turns off to save battery. It wakes up instantly the moment you move the bike.

3. Mounting

The Q5 typically comes with Saddle Rail Mount: Fits perfectly between the rails of all kind of saddle neither alloy or carbon rails.

Visual References & Identification

When looking for the Antusi Q5, identify it by these four visual markers:

The Chassis: Look for a round, threaded aluminum body with cooling fins. It feels heavy and premium compared to plastic lights.

The Halo Ring: The LED is a "COB" (Chip on Board) ring, which provides a soft, circular glow rather than a harsh single point of light.

The Single Button: There is one central button (the lens itself acts as the button). Pressing it cycles through the 4 modes (Flash, Breathing, SOS, Solid).

The Indicator: A ring of small blue LEDs around the center button indicates current battery life.

Why It’s Perfect for Brompton

The "Invisible" Light:

Because the Q5 is so compact, it can stay mounted to the saddle rails even when the seat post is fully retracted during folding. Unlike larger lights, it won't hit the rear frame or get knocked out of alignment.

Installation Pro-Tips:

Tightening: The light body unscrews from the mount to reveal the USB charging port. Ensure the body is screwed tightly into the bracket so it doesn't vibrate loose on bumpy roads.

Mode Memory: The Q5 remembers your last used mode, so you don't have to cycle through them every time you start your ride.

Comparison: Antusi Q5 vs. Brompton CatEye

Feature	Antusi Q5	Brompton CatEye (Standard)
Brake Sensing	Yes	No
Auto On/Off	Yes	No
Housing	Aluminum	Plastic
Mounting	Saddle Rails	Under Saddle / Rear Rack

Key Visual Details of the Antusi Q5:

CNC Aluminum Chassis: You can see the high-quality, threaded aluminum body. This serves as a heat sink for the LEDs and provides far superior durability compared to plastic alternatives.

Saddle Rail Mounting: The images show how the bracket clamps onto the metal rails of the saddle. This keeps the light tucked away and protected, and most importantly, it stays clear of the Brompton frame during the fold.

The COB LED Ring: Notice the circular "Halo" light pattern. This provides 180-degree visibility, ensuring you are seen from the sides as well as from directly behind.

USB-C Charging Port: By unscrewing the light from its mount, the charging port is revealed. This design protects the port from rain and mud while riding.

Brompton Malaysia  

📍Location: P-10, Pusat Bandar, 1, Jalan Jalil Utama 2, Bukit Jalil, 57000 Kuala Lumpur, Wilayah Persekutuan Kuala Lumpur

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Please note that these hours may be subject to change in the future based on circumstances such as public holidays, special events, or operational needs. We recommend checking our Instagram or Facebook or contacting us directly for the most up-to-date information before visiting.

📞 Phone Number: +601115987298 (Whatsapp or call)

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