Portland Design Works Gravity 100 Usb Tail Light With Accelerometer-Fast Shipping

Description

The Gravity Plus Tail Light has a built-in accelerometer that detects deceleration or swerving and automatically changes to a super bright, solid beam to warn following traffic. To allow the accelerometer to calibrate, always install the Gravity+ on your bike before powering it on. Hold the power button down for 1 second to turn the light on or off. Then, keep your bike still for 1 second after pressing the power button to complete the calibration. 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 Micro USB recharging cord Weight: 1.9 oz  Â