??Description:<br /> Super high-brightness LED<br /> Automatic light-controlled skip flashing<br /> Easy to install¡ê? with groove to fit into the spoke<br /> Flash Colour: Red and blue<br /> Product Colour: White<br /> Size: 6cm x 2.3cm x 1cm<br /> NetWeight: 16g<br /> Powered by 3 AG3 batteries each one(Included)<br /> <br /> Package Included:<br /> 2 x alarm lights of bicycle<br /> 6 x AG3 batteries<br /> <br /> Note:Please pull out the plastic cover from cells before use it.