CatEye: Reliable, high performance 300 Lumens. Pumping out an attention-grabbing 300 lumens with OptiCube™ lens technology, the versatile ViZ300 stands out with the power of Daytime Hyperflash™ mode and the friendliness of Group Ride mode. In addition, the ViZ 300 has fast charging & 45-hour maximum runtime to keep you going on those epic journeys. The innovative new Snap System™ bracket is simple to fit and place in your preferred position on the bike including modern flat back aero seat posts. The modern design makes this safety light into a stylish essential accessory to keep you riding anytime, day or night. The ViZ Family of lights all come with our highly visible 300° side visibility, to give you more confidence & safety the whole year round. FEATURES:3 LEDs (300 lumens)Focused lens for maximum visibilityHighly visible during daytimeSuperior 300 degree visibilityLong rear beam projectionClear OptiCube™ lens technologyLithium-ion rechargeable batteryUSB rechargeable (Micro-USB cable included)Low battery indicator4 modes: Constant / Flashing / Group Ride / Daytime HyperflashMode memory functionBattery Auto Save (The mode automatically changes to flashing when the battery power gets low.)New seat post bracket SP-15 which fits contemporary (Kammtail) aero seatpostSnap System™ bracketWeight: Only 47gDesigned in JapanRUNTIME:Constant (30 lumens):5 hrsFlashing (30 lumens):45 hrsGroup Ride (100 lumens):8 hrsDaytime Hyperflash (300 lumens):10 hrsCharging time (From empty) : 3 hrsTECHNOLOGIES:Opticube™ Our proprietary OptiCube™ lens technology maximizes brightness for greater visibility.Snap System™Allows riders to place rear lights on various locations in both horizontal and vertical orientations.Side VisibilityProvides 300° visibility from the side to increase safety.Low Battery IndicatorAlerts when remaining battery gets lowUSB RechargeableUSB rechargeable products recharge that batteries from any USB port.DaytimeCan be used in the daytime.All Weather IPX4Can be used in rainy weather.