The NiteRider Sentry Aero 260 is a lightweight, aero taillight featuring dual LED light strips to deliver 260 lumens of Daylight Visible red light. An inner and outer lens design helps to shape light output, producing long-range visibility when viewed directly from the rear, but also providing ample surrounding light to the peripheral, making the Sentry Aero 260 visible from nearly any angle. - Daylight Visible Flash (DVF) - 260 lumen super bright tail light - Group Ride Mode - be seen without distracting fellow cyclists - Easy on and off Aero seat post strap mount with quick release tab - Aero seat post strap included - Convenient USB rechargeable - Super bright Daylight Visible Flash mode - Innovative Aero shape with excellent side visibility - FL1 Standard IP64, dust and water-resistant WARRANTY - The Sentry Aero 260 is backed by NiteRider's lifetime warranty that covers any defects in material and workmanship, mechanical components (housings, covers, mounts and fasteners) and LEDs. SYSTEM INCLUDES - LED Tail Light - Seat post Mount - USB Cable