features for drivers to see other cyclists at night & the pumpkin lamp image is agreeable for decoration. Feature: PVC & ABS plastic, durable & environmental friendly. Light sensation & dynamic sensation without switch, only works when wheel in dark or action. Suitable for E/V, F/V & A/V. Unscrew the British valve to fit the Schrader valve. Powered by 3 AG10 button cells with one signal light & works well in rainy days. Pumpkin lamp cap design, a great gift for Hallowmas.