When you absolutely, positively need to be seen, day or night, rain or shine, trust CatEyes brightest rear safety light. The ViZ450 features 5 LEDs, 300-degree visibility, OptiCubelens technology, and makes sure you stand out with the power of Daytime Hyperflashmode.Key Features:5 LEDs (450 lm)Up to 65 hours runtimeFocused lens for maximum visibilityHighly visible during daytimeSuperior 300 degree visibilityLong rear beam projectionClear OptiCubelens 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 SystembracketWeight: Only 45gDesigned in JapanRuntime:Constant (40 lumens)5 hrsFlashing (40 lumens)65 hrsGroup Ride (130 lumens)10 hrsDaytime Hyperflash (450 lumens)14