Key Features:3 LEDs (300 lm)Highly visible during daytime300 degree visibilityLong rear beam projectionOptiCubelens technologyLithium-ion rechargeable batteryUSB rechargeable (Micro-USB cable included)Low battery indicator4 modes *Charging time: 3hMode memory functionBattery Auto Save (The mode automatically changes to flashing when the battery power gets low.)New seat post bracket SP-15 which fits comtemporary (kammtail) aero seatpostSnap SystemRuntime: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 OptiCubelens technology maximizes brightness for greater visibility.Snap System: Allows riders to place rear lights on various locations in both horizontal and vertical orientations.Side Visibility: Provides 300° visibility from the side to increase safety.Low Battery Indicator: Alerts when remaining battery gets lowUSB Rechargeable: USB re