Great all round value and performance, the Cateye new AMPP400S front light and ViZ100 rear light set gives you 360° safety within one affordable kit. The fully featured AMPP400S comes with 5 light modes, a tactile on/off button that wors well even when wearing gloves, whilst the powerful ViZ10 gives a massive 100 hours of runtime. The AMPP400S / ViZ100 Lightest makes the perfect gift for the cycling enthusiast. The perfect set for twilight or early morning rides, urbans/city riding or for longer endurance rides. Technology Daytime: Can be used in the daytime. All Weather IPX4: Can be used in rainy weather. Side Visibility: Provides visibility from the side to increase safety. USB-Type-C (AMPP400S): Reversible USB Type-C connector eliminates the worry about plug orientation. OptiCube: Our proprietary OptiCube™ lens technology maximizes brightness for greater visibility. FlexTight (AMPP400S): The FlexTight™ bracket can be quickly and securely fastened to the handlebar without tools. Low Battery Indicator: Indicates a battery level. SnapSystem (Viz100): Place rear lights on many locations in both horizontal and vertical orientations. Features (AMP 400S) Rechargeable headlight (400 lm) Excellent side visibility Large power button for easy operation Turns on High mode with double click of power button Up to 60 hours of run time 5 light modes – High / Middle / Low Daytime Hyperconstant / Flashing Light mode memory Excellent daytime visibility in Daytime HyperConstant mode Weight : 106 g Mount size : 22 - 35 mm Runtimes: (AMP 400S) High mode 400 lumens： 2hrs Middle mode 200 lumens： 4hrs Low mode 100 lumens： 8hrs HyperConstant mode 400/100 lumens： 6hrs Flashing mode 100 lumens： 60hrs Charging time (From empty) : 4 hrs Features (ViZ100) 3 LEDs (100 lumens) Focused lens for maximum visibility Highly visible during daytime Superior 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: 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 also fits contemporary (Kammtail) aero seatpost Snap System™ bracket Designed in Japan Runtimes (ViZ100) Constant (15 lumens)：5 hrs Flashing (10 lumens)：70 hrs Group Ride (35 lumens)：11 hrs Daytime Hyperflash (100 lumens)：15 hrs Charging time (From empty) : 3 hrs