The Blackburn Grid Side Beacon has been designed to work in tandem with front and rear lights to keep you more visible from a full 360 degrees. Designed to be mounted to either side of your fork with reusable silicone straps the Grid Side Beacon can be used as stand-alone lights or as part of your light set. Includes two lights to mount on either side of your fork or frame 85 Lumens LED Fuel GaugeCharge Indicator 360 degree visibility when used with frontrear lights Improve your side visibility in daytime or nighttime Weather resistant Includes O-rings 2 65mm large fork legs and 2 35mm small fork legs Dual micro-USB charging cable 2 LiPo batteries