The Cateye Sync Core / Sync Kinetic Bluetooth Connected Bike Light Set offers powerful illumination and smart safety features. The SYNC Core boasts 500 lumens with OptiCube lens technology, while the SYNC Kinetic light features a built-in accelerometer that turns on high mode when you slow down, enhancing your visibility and safety.Key Features and Benefits:500 lumens with OptiCube lens technology: Provides a round beam, ensuring consistent and broad illumination for enhanced visibility.Built-in accelerometer in SYNC Kinetic light: Automatically activates high mode when decelerating, alerting others to your presence for improved safety.One-touch control with smartphone app: Pair up to 7 lights and manage them with a single touch, simplifying light management.Multiple light modes: Five modes including constant, flashing, and daytime hyper constant ensure visibility in various conditions, increasing rider safety.Long battery life: Headlight runs up to 130 hours and taillight up to 50 hou