Length: 9.0cm. Diameter: 2.5--3.5cm. Weight: 35 g. Package including: 1 pcs and without battery. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.

• Easy installation, no tools required.
• good for riding outside at night.
• stylish design
• Ideal accessory for bicycle.
• Durable

Easy installation, no tools required.Chen Han