SYNC Core & SYNC Kinetic KitThe ideal SYNC smart light starter kit Pair up to 7 lights and use the SYNC Core's power button or the smartphone app to turn all lights on off SYNC Core: 500 lumen headlight, controls all other SYNC lights SYNC Kinetic: 50 lumen rear light with Kinetic function that flares up when braking and synchronizes lighting modes with other SYNC rear lights Maximizes the user's visibility in a simple, effective manner