1. No need to modify wires, it can be directly mounted on the steel wire of the wheel.2. Support multiple lights on one wheel.3. Switch design, with 3 lighting modes (normally on, flashing, quick flashing)4, Both sides are bright, greatly improving traffic safety.5. Good waterproof performance.Color:MulticolorSpecifications: Material: ABS plastic Size: 125 x 38 x 10mm/4.92 x 1.50 x 0.39" Weight: 20g Shape: willow Light color: red/ blue/ green/ multicolor Battery: 1 x CR2032 (3V) button battery (included) Application: for Fixed Gear/ mountain bikes/ electrical bikes/ road bikes/ folding bikes/ motorbikes Package included: 1 x Bicycle Spoke Light