Compact, bright, and versatile, the ViZ150 stands out with high visibility from OptiCube™ lens technology and Daytime Hyperflash™ mode in an economical package.Key Features:3 LEDs (150 lm),Highly visible during daytime,300 degree visibility,Long rear beam projection,OptiCube™ lens technology,Lithium-ion rechargeable battery,USB rechargeable (Micro-USB cable included),Low battery indicator,4 modes *Charging time: 3h,Mode memory function,Battery 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 seatpost,Snap System™.Runtime:Constant (20 lumens):5 hrs,Flashing (15 lumens):70 hrs,Group Ride (50 lumens):11 hrs,Daytime Hyperflash (150 lumens):15 hrs,Charging time (From empty) : 3 hrs.Technologies: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 orientation:,Side Visibility: Provides 300° visibility from the side to increase safety.,Low Battery Indicator: Alerts when remaining battery gets low,USB Rechargeable: USB rechargeable products recharge that batteries from any USB port.,Daytime: Can be used in the daytime.,All Weather IPX4: Can be used in rainy weather..