100 lumens of affordable power and runtime in a lightweight compact body.   Opticube™ Cateye 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 orientations.   Side Visibility Provides 300° visibility from the side to increase safety.   Low Battery Indicator Alerts when remaining battery gets low.   Daytime Can be used in the daytime.   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 seatpost. Snap System™ bracket. Designed in Japan. All Weather IPX4. Can be used in rainy weather..   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.