led bike lamp 1. material: silicagel 2. size: 4x3x3cm 3. color: yellow,red,grey,blue,purple,white led bike lampmaterial: silicagelsize: 4x3x3cmcolor: yellow,red,grey,blue,purple,whitebattery: button cell(2032) 2pcs1. competitive price and good quality2. good service3. OEMfor style,size and color, we may make according to customers' special requirements. new design bike lamp