The product is consist of 14 pcs colorful LEDsIt can flash 30 different kinds of patterns， patterns will be changed every 4 secondsPattern is clear and completely when speed up to 20kms/hourEquipped with light sensor and movement sensor， flash only at action， it will not work and save power when not ridingSpecifications:Battery: 1 x AAA ( not include)Could be maximed to 12 hours when it workModes: slow， quick， steadyColor:BlueSize:67x36x13 mmNet Weight:48 gWeight:58 gPackage Include:1 * Bicycle Spoke light