Product Description Long Battery Life: Bike Lights 1500 mAh lithium battery, strong power storage, fast charging, generally fully charged in 2 hours. The battery life in highlight mode is about 5 hours; the battery life in medium light mode is about 10 hours; the battery life in flash mode is about 15 hours Size Material: About 3.9*1.18*0.9 inches, weight about 88g, mini shape, small and portable; ABS material, high strength, strong toughness, good impact resistance, multiple waterproof function, you can ride safely in rainy days Adjustable Mode: A total of 4 adjustment modes, click the boot blue indicator light to enter the light-sensitive vibration mode, then click to turn on the highlight mode, then click to turn on the medium-light mode, that is, the energy-saving mode, then click to turn on the flashing mode, and long press to turn off Durable: With plenty of brightness and even light distribution, this night cycling bike light stands up to the elements and is conducive to riders seeing and being seen, the light is soft and not harsh, meets the needs of daily commuting outdoor night cycling.