PORTLAND DESIGN WORKS Gravity Plus USB Rear Bike Light

Stay visible and ride safer with this PDW Gravity Plus Rear Light, a smart rear bike light engineered with a built-in accelerometer that detects braking and sudden movement. When you decelerate or swerve, the light automatically switches to a super-bright solid beam at 100 lumens, instantly alerting vehicles and riders behind you—ideal for road cycling, commuting, and night riding

There is a traditional rear light positioned just beneath the accelerometer unit in one set up, delivering up to 80 lumens in flash mode with a runtime of up to 30 hours—ensuring consistent visibility while you ride

Designed for maximum safety and ease of use, the Portland Design Works Gravity Plus bicycle light enhances rear visibility in all conditions while giving you confidence on busy streets and low-light rides

Specifications:

• Automatic accelerometer brake light function shines 100 lumens bright
• 2 Modes (runtime): Solid - 20 lumens (12 hours), Flash - 80 lumens (30 hours)
• USB rechargeable li-polymer battery
• Weatherproof exterior for all season riding
• Seatpost and backpack clip mounts included
• Mounts vertically or horizontally
• Includes USB-C recharging cord
• Weight: 1.9 oz

For optimal performance, mount the Portland Design Works Gravity Plus Rear Light securely on your bike before turning it on. Press and hold the power button for 1 second, then keep your bike still for another second to allow the accelerometer to calibrate correctly