Amazing value all in one 100 lumen front & rear light set package. AMPP100 Features: Compact rechargeable headlight (100 lm) Up to 35 hours runtime Features - Easy to attach and remove, new & improved rubber band mount with 360° rotation Excellent side visibility Low battery indicator Lithium-Ion USB rechargeable battery (Micro-USB cable included) Mode memory function Two light modes (Constant / Flashing) Weight: Only 62g Designed in Japan. Runtime: Constant (100 lumens): 3.5 hrs Flashing (100 lumens): 35 hrs Charging time (From empty): 2.5 hrs ViZ100 Features: 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 seat post. Snap System™ bracket. Designed in Japan. Runtime: 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 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 100) Allows riders to place rear lights on various locations in both horizontal and vertical orientations. 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. USB Rechargeable USB rechargeable products recharge the battery from any USB port. 360° Adjustable (AMPP 100) Light turns 360° for a multitude of lighting positions.