It’s time for road safety to run ‘round the clock. Introducing the Rapid X2 Kinetic a movement-sensitive day and nighttime light for your ride. The Rapid X2 Kinetic is a 50-lumen USB rechargeable safety light that mounts easily on your seatpost. A built-in accelerometer automatically switches into a constant burst mode when it senses a sudden change in speed. Similar to daytime running lights on an automobile the Rapid X2 Kinetic helps make your presence known as a cyclist. 180 degrees of visibility allows you to be seen from varied perspectives. A Battery Auto-Save feature makes sure you’re covered the entire ride by automatically switching to a flashing mode should the battery run low.With up to 30 hours of runtime the Rapid X2 Kinetic ensures you’ll be drained from your ride long before your light is. A built-in accelerometer automatically switches into a constant burst mode when deceleration detected braking or slowing down. Bringing together the brightness and 180 degree visibility of the Rapid range the new Kinetic light adds an additional dimension. With a built in sensor which detects the movement of the rider the beam will automatically change from flash to constant when stopping.3 modes: Constant / Flashing / RapidUp to 50 lumen outputFixed beam from pulse when stoppingCOB LED technologyLi-Polymer battery180 degree visibilityComplex circuitry allows safe charge and dischargeUSB recharge 2 hrsO-Ring attachmentBattery auto saveLow battery indicatorLight mode memory