• With 7 light colors that can be switched, click to change to one color
• In addition, in the off state, long press 3 seconds to enter the 18 patterns change mode, and the light color will automatically change
• Built-in rechargeable 550mAh lithium battery, rechargeable design, it can be used for up to 20 hours after fully charged
• A popular bike accessory for Christmas and other festivals, and also a fun birthday present for people who have a bike

Specification:

• Material: ABS
• LED bead: 7pcs LED beads
• Battery type: built-in 550mAh lithium battery
• Working time: about 5-20 hours 
• Mounting hole diameter: 19-36mm
• Product size: diameter: 10.6cm, width: 2cm