Features17 kinds of colorful lighting modes, cool and safe at night, such a beautiful aperture, it is difficult for people not to notice. 2Can be screwed to the valve stem of your bicycle, motorcycle or car in a few seconds, easy to install, need no wire, easy to install and remove. 3You can manually control the switch and flashing mode, and press the button to change to a mode, which is very convenient. 47 modes can be switched with one button, always on, fast flashing, slow flashing, single light strobe from up to down, single light strobe from down to up, strobe back and forth from up to down, irregular strobe. 56pcs button batteries included can be installed on the valves of bikes, motorcycles and automobiles, and are suitable for Schrader valves.SpecificationItem Type:Bike Valve Cap LightMaterial:ABSLight Color: Red, Green, BlueLength: Approx.9cm/3.5inDiameter: Approx.1.3cm/0.5inInner Diameter of Tthreaded Port: Approx.7.5mm/0.3inWeight: Approx. 40.0g/1.4ozBattery: 6Pcs LR1130 (or AG10) Button Batteries 65mAh, 3Pcs Batteries for a lamp (included)Light: 3 Colors Total 5 LED Beads per Light7 Lighting Modes: always on, fast flashing, slow flashing, single light stroboscopic up to bottom, single light stroboscopic from bottom to up, stroboscopic up and down, irregular stroboscopicPackage List2 x Bike Valve Cap Light