Features1Made of high quality materials, strong and durable. 2Built-in light source, comes with 3 lighting modes - flash, constant and off. 3Built-in 2pcs CR2032 battery, can be removed and replaced as you like. 4Pressing the little yellow duck to make a noise, reminding the people around. 5Lightweight and mini, easy to carry and install.SpecificationFeatures:Made of high quality materials, strong and durable.Built-in light source, comes with 3 lighting modes - flash, constant and off.Built-in 2pcs CR2032 battery, can be removed and replaced as you like.Pressing the little yellow duck to make a noise, reminding the people around.Lightweight and mini, easy to carry and install.Specifications:Item Type: Bike Yellow DuckMaterial: Rubber + PCOptional Style: Green, RedBattery: Built-in 2 * CR2032 BatterySize: Approx. 13 * 10 * 5.5cm / 5.1 * 3.9 * 2.2inchWeight: Approx. 45gPackage List:1 * Yellow Duck1 * HelmetPackage List