Features: ? No battery connection required - No need to connect to the vehicle?s battery.It lights up itself using high-quality metal gold-plated inner zone button batteries. ? Easy to install : Simply screw it onto the tyre valve. Twist off your original valve cap and replace with this valve cap LED light. Installs on standard tyre air valve of cars motorcycles or bicycles ? Light Sensor ? to ensure that the light does not switch on during the daytime. ? Waterproof - The valve has a light mouth small waterproof case ? Sealed Pack ? Powered by 3pcs AG10 batteries ? Fit for bicycle motorbike cars ? Plastic Material ? Size: 60(L) x 18(D)mm Weight: 27g.