Bicycle Valve Light includes the following features : 

• More energy-efficient with light & motion sensors
• Independent circuit design, composed of dynamic sensing circuit and light emitting circuit
• Auto shining, no switch required
• Fits for Presta & Schrader valve
• Please kindly note there is a piece of paper in the battery case that needs to be removed before use, then put them on the valve stem and ride, they will light up
• Requires 3 x AG10 batteries per light (included)
• Colors: Red, green, blue and yellow

Material :

• Aluminum and plastic

Size closed :

• Length of 6.3 x Diameter of 1.8 cm (per light)