As this bike light is designed with a two-in-one light and horn, it is very practical. Moreover, it also adopts waterproof design, which can make it less susceptible to rain damage and long service life. What allows you to switch as needed is the 3 modes design. It ensures an excellent lighting effect because it is designed with high brightness LED lamp bead. It is constructed of ABS engineering plastic material. The length of this product is 10cm and the width is 4.5cm. It is suitable for outdoor riding. Item Name: Bicycle Headlight Material: ABS Engineering Plastics Features: High Brightness, Long Range, Easy Installation Horn: About 120 Decibels Lamp Beads: XPE Lamp Beads Remote Control: Split Remote Control Lumen: Up to 250 Lumens Waterproof Rating: IPX5 Size Details: 10cm x 4.5cm/3.94" x 1.77" (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 Bicycle Headlight 1 x Split Wire Control Horn 1 x Silicone Base 1 x Data Cable