Installs in seconds without the need for any tools so you'll be ready to go in no time. Extremely lightweight materials means you won't even feel the weight of the light on your bike.Ensure that you are safe to ride at night so that others can see you from the front and back. Suitable for outdoor sports or bicycle competitions.This product is made of waterproof silicone.Size: 90mm x 30mm/3.54" x 1.18" (Approx.)This product is suitable for bike.Item Name: Bike LightMaterial:SiliconeBatteries: 2Pcs AG-10 Batteries (Included)Color: RandomSize:6.95cmx4.05cmx3.9cm/2.74inx1.59inx1.54inNotes: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:2 X Waterproof Silicone LED Flash Lights