Description: Due to the rechargeable battery and waterproof shell, the helmet light is energy-efficient, wear-resistant and has a long service life. High brightness enables you to ride safely and run at night, this helmet light can be attached to the tail of a motorcycle or bicycle. This helmet light is constructed of plastic material. The length of this helmet light is 8.7cm, the width is 3.5cm and the height is 1.5cm. Suitable for mountain bike, motorcycle and so on. Item Name: Helmet Light Material: Plastic Features: Strong Stickiness, Battery Powered, Waterproof Charging Voltage: 3.7V Working Voltage: 2.6-4.2V Working Current: 30mA Operating Temperature Range: -20 Degrees Celsius to +55 Degrees Celsius Waterproof Level: IP67 Built-in Battery Capacity: 600mAh Light Mode: Always On, Flashing, Left and Right, Breathing Light 4 Modes Size Details: LxWxH: 8.7cm x 3.5cm x 1.5cm/3.43" x 1.38" x 0.59" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Helmet Light 1 x Charging Cable