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Overview

How Does the PDW Gravity Plus Brake Light Work?

The PDW Gravity Plus USB Tail Light has a built-in accelerometer that detects deceleration or swerving and automatically changes to a super bright, solid beam of 100 lumens to warn following traffic. It runs on a USB rechargeable li-polymer battery, and a USB-C recharging cord is included.

To let the accelerometer calibrate, always install the Gravity Plus on your bike before powering it on. Hold the power button for 1 second to turn it on or off, then keep your bike still for 1 second to complete the calibration. It has two modes, Solid at 20 lumens (12 hours) and Flash at 80 lumens (30 hours), a weatherproof exterior for all season riding, and included seatpost and seatstay brackets that mount the light vertically or horizontally.

All the specs

Charging
USB rechargeable li-polymer battery, USB-C cord included
Smart Feature
Built-in accelerometer detects deceleration or swerving
Auto Mode
Switches to a 100 lumen solid beam on deceleration or swerving
Modes
Solid 20 lumens (12 hours), Flash 80 lumens (30 hours)
Mounts
Seatpost and seatstay brackets included, vertical or horizontal
Weight
1.9 oz
Power
Hold button 1 second to turn on/off
Calibration
Install on bike before powering on, hold still 1 second after activation

FAQ

Good questions

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How does the accelerometer brake detection work?

The built-in accelerometer detects deceleration or swerving and automatically changes the light to a super bright, solid 100 lumen beam to warn following traffic.

How do I calibrate it?

Always install the Gravity Plus on your bike before powering it on. Hold the power button down for 1 second to turn it on, then keep your bike still for 1 second to complete the calibration.

Is USB charging included?

Yes. It has a USB rechargeable li-polymer battery and includes a USB-C recharging cord. Runtime is 12 hours in Solid mode (20 lumens) and 30 hours in Flash mode (80 lumens).

Reviews

What riders say about the PDW Gravity Plus USB Tail Light

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