Main Feature:<br />When it is dark and your wheels start to move? they automatically flash light up creating a flashing of light that appears to hover above your wheels<br />If you want to add that personal touch to your Car? Bike - lighting is one of the best ways<br />They are self contained with motion sensors? LEDs? and replaceable built-in watch batteries<br />Powered by three button cell batteries (Batteries included)<br />When you stop they will switch off to save battery power<br />Increases nighttime and bad weather visibility for enhanced safely<br /><br />    Specifications<br />Specification<br />	 Type: Tire Valve Caps                                                  <br />                        Package weight   : 0.050  kg                                                  <br />                        Package size (L x W x H)  : 12.0 x 7.0 x 1.5 cm                                                  <br />                        Package Contents: 1 x 7LED Tire Light for Car Bicycle for Car Bicycle? 3 x AG10 Batteries                                                	<br /><br /><br /><br />                                                <br />