Product Parameters: Product name: Lighting warning light helmet Material: shell PC + inner tank black EPS integrated molding. Light mode: Front light is always on and the rear light is flashing on & off Battery: 750mAh Charging time: 2 hours fully charged. Standby time: 160 days. Battery life: 6 hours (most power consumption mode) Current 3.78v, front light power 150W, rear light power 314W Product Description: 1. Protects you on the road – the light helmet is equipped with interior protective padding, adjustable security straps, and front & back LED lights. 2. Shines bright for longer hours – helmet is built with USB-rechargeable lights with 4 luminous modes 3. Fits Great – Electric helmet with LED designed to fit both kids and adults. 4. Breathable lightweight helmet – designed with breathable air vents for a cooler, more comfortable riding experience even under the heat of the sun. Sizes Available: Large: weight 340gram / Head size 58-61cm