Safety first, the AMPP400 comes with maximum side visibility, securely held in place with our adjustable FlexTight™ bracket.AMPP 400 Key Features:Rechargeable headlight (400 lm),Wide beam with OptiCube™ lens technology,Excellent side visibility,Low battery indicator (Illuminates in red with less than 20% battery remaining),USB rechargeable (Micro-USB cable included),Mode memory function,Four light modes (High / Low / Daytime HyperConstant / Flashing),Turns on High mode with double-click of power button.,FlexTight™ bracket,Improved release button has made it easy to remove the light unit from the bracket.,Helmet mount and center fork bracket (optional),Weight: Only 117g,Designed in Japan..Runtime:High mode 400 lumens: 2hrs,Low mode 200 lumens: 4hrs,HyperConstant mode 400/200 lumens: 6hrs,Flashing mode 200 lumens: 60hrs,Charging time (From empty) : 2.5 hrs..ViZ 150 Key Features:3 LEDs (150 lumens),Focused lens for maximum visibility,Highly visible during daytime,Superior 300 degree visibility,Long rear beam projection,Clear OptiCube™ lens technology,Lithium-ion rechargeable battery,USB rechargeable (Micro-USB cable included),Low battery indicator,4 modes: Constant / Flashing / Group Ride / Daytime Hyperflash,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 contemporary (Kammtail) aero seat post.,Snap System™ bracket.,Weight: Only 27g,Designed in Japan..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.,Side Visibility: Provides visibility from the side to increase safety.,Snap System™ (ViZ 150): Allows riders to place rear lights on various locations in both horizontal and vertical orientations.,FlexTight™ (AMPP 400): The innovative and versatile Flextight™ bracket can quickly and securely fastened to virtually any handlebar with no tools required,USB Rechargeable: USB rechargeable products recharge the battery from any USB port.,Low Battery Indicator: Alerts when remaining battery gets low,Daytime: Can be used in the daytime.,All Weather IPX4: Can be used in rainy weather.