Specifications: High quality and super bright LED. It can keep you safe when riding at night. Easy to install, portable and durable. There are two laser bulbs at the bottom of the lamp. It is not only a safe helper but also a beautiful decoration when using in the evening. Type: Bike Tail Light Material: ABS, PC Mode: Flashing/Slow Flashing/Steady on Powered by: 2 x AAA Batteries (Not Included) Output Voltage: 3V Features: Warning Light, Safe Helper, Bike Accessory, Easy to Use, Portable, Durable Size: 77mm x 73mm x 36mm/3.03" x 2.87" x 1.42" (Approx.) Notes: Suitable for bike with tube diameter under 3cm. 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. Package Includes: 1 x Bike Tail Light