... battary 4.Good gifts product details NameSilicone bicycle lightmaterialSilicone and plasticsize15*4cmweight17.5gSilicone colorRed,white,black,blue,green,orange,yellow,pink,purple ... light ,skinning light ,warning lightFeature1.Waterproof bicycle light2.Cobra shape,fashion design3.2 in 1 set( 1 White Front LED and 1 Rear ...