High brightness-wheel lamps of bike formed with 20 pieces super light LED, Get 100% Brighter and Visible from All Angles for Ultimate Safety & Style.Suitable from 12″ bike to 29″ bike, example the folding bike, road bike, mountain bike, Children bicycle etc.Lighting mode-This color-changing bicycle wheel light has 16 modes. long press Power key It can be turned on or off bike lights.In the off state, long press Power key for to enter the Automatic flash mode.then short press once to switch one mode or color. Red, green, blue, light blue,Purple, yellow, white each flashing and full lighting.USB Rechargeable Li-ion Battery. Super fast charging, super long working! Simply recharge it with connecting to notebook, computer, or other USB power source.Sumree The latest upgrade, fashionable bicycle wheel lights.Yes, batteries ARE included so you’re ready to ride, right out of the box!