X-TIGER Smart Brake Sensing Bike Tail Light – IPX6 USB-C LED

Stay visible and ride with confidence using the X-TIGER Smart Brake Sensing Bicycle Tail Light (Model WD-1101). Engineered from durable aluminum alloy and ABS/PC/PA66, this compact rear light automatically flashes at maximum brightness the moment you brake — alerting drivers and pedestrians behind you in an instant.

Why Cyclists Love the X-TIGER WD-1101 Taillight

• Auto Brake Sensing: Built-in accelerometer detects braking and instantly triggers high-brightness mode for 3 seconds, giving everyone behind you a clear, unmistakable warning signal.
• 6 Versatile Light Modes: Always On / Fast Flashing / Slow Flashing / Rhythmic Flashing / Breathing Flashing / Energy-Saving Flashing — switch to match any riding condition.
• Auto & Manual Operating Modes: In Auto Mode, the light powers off after 30 seconds of no movement and wakes automatically when the bike moves again. In Manual Mode, you stay in full control.
• Smart Light Sensor: The ambient light sensor automatically activates the tail light when surroundings dim and powers it down when sufficient daylight is detected — true set-and-forget convenience.
• IPX6 Waterproof Rating: Handles heavy rain, splashes, and unpredictable weather so you're always visible no matter the conditions.
• Long-Lasting 420mAh Li-Ion Battery: Up to 9 hours of runtime at maximum brightness on a single charge; a built-in charge indicator tells you exactly how much power remains.
• USB Type-C Charging: Charge quickly and easily from any power bank, laptop, or USB adapter using the included Type-C cable.
• Tool-Free Installation: Saddle rail bracket and adjustable silicone straps let you mount the light on virtually any seatpost or saddle rail in seconds — no tools required.
• Ultra-Lightweight: Weighs just 100 g, so it adds virtually no extra load to your setup.

Full Specifications

How to Operate

1. Auto-Sensing Mode: Single-click the button while powering on to activate smart auto mode with brake sensing.
2. Manual Mode: Long-press the button for 3 seconds while powering on to use full manual control.

Note: Always use the included charging cable to avoid potential damage to the light.

Related Cycling Gear

• 1.3m Spiral Cable Protector for Xiaomi M365 & Ninebot Scooter
• 1/4" & 3/8" to M4–M10 Thread Conversion Screw Mount Adapter

For more information on cycling safety and road visibility standards, visit the U.S. Consumer Product Safety Commission – Bicycle Safety Guidelines.

Learn more: Corner reflector

Frequently Asked Questions

Q: Does the X-TIGER WD-1101 tail light work in heavy rain?

A: Yes! The X-TIGER WD-1101 carries an IPX6 waterproof rating, meaning it is fully protected against powerful water jets from any direction. It is built to perform through heavy rain and wet riding conditions without issue.

Q: How does the smart brake sensing feature work on this bicycle tail light?

A: The built-in accelerometer continuously monitors deceleration. When the light detects a sudden decrease in speed (i.e., braking), it automatically switches to maximum brightness for 3 seconds, creating a highly visible braking signal for vehicles and pedestrians behind you. This works in both Auto and Manual operating modes.

Q: How do I charge the X-TIGER bike rear light and how long does the battery last?

A: Charge via the included USB Type-C cable — simply plug it into any USB power source such as a power bank or wall adapter. A full charge powers the light for up to 9 hours at maximum brightness. You can check remaining power by clicking the button while the light is off; the indicator light will display battery status.

Q: Is the tail light compatible with all bike seatposts?

A: The X-TIGER WD-1101 comes with a saddle rail mounting bracket and adjustable silicone straps, making it compatible with most round and aero seatposts as well as saddle rails. Installation requires no tools and takes only seconds.