Features:<br>Light Color: 7 Color change<br>Cool skull design, Can be installed anywhere.<br>Suitable for bicycles, backpacks, helmets, hub, etc<br>With two ultra-wide-angle LED, ultra-high brightness provide20000mcd.<br>More than 600 meter warning distance<br>100 hours of extraordinary lighting time.<br>Easy to install, not need any tools<br>Suitable for Appr 10mm-35mm diameter pipe.<br>Use CR2032 battery(Including).<br><img alt="" src="http://img.sellercube.com/UploadFile/P0/POA160592/f5edef6e-bb15-888c-2a6d-b77a1b175d48.jpg"style="width: 800px; height: 800px;"><br>Specification:<br>Battery: 2 x CR2032(Including)<br>Mode: Steady and Flashing<br>Color: Blue<br>Light Colour: Colorful<br><img alt="" src="http://img.sellercube.com/Uploadfile/6/SKU108255/20140124105415892.jpg"style="width: 800px; height: 800px;">