One of the new varia line of smart cycling devices from garminfirst rearview radar system for bikes that warns of vehicles approaching from the rear up to 140 metresworks independently or wirelessly connects with compatible garmin edge cycling computersedge computer or handlebar mounted varia head unit indicates when one or more vehicles are approaching from the rearriders alerted to relative speed of approaching vehicles and how close they aretail light unit brightens and flashes to notify appr