For helmet installation only. Head and tail integrated safety light (Front: This is not the brightness of the front light required for traffic laws. Only for use as an auxiliary light. / Rear: This light is auxiliary light [blinking]. Always use with rear reflector [red]. The front is approximately 30 lumens (flashing). Lens integrated switch Rubber band installation with high degree of freedom Can be used as a daytime light. Lens shape with excellent side visibility. Front lighting: Approx. 100 hours (15 lumens); Flashing: Approx. 100 hours (30 lumens); Rear: Flashing (10 lumens). Note: This product is designed with 2 AAA alkaline batteries. Using rechargeable batteries or high-performance batteries may cause malfunction. It is not completely waterproof, so please wipe off moisture after using in rainy weather. Weight: 1.8 oz (51.5 g) (including main unit, rubber band, and batteries). Please read the instruction manual carefully before use.