Specifications: USB rechargeable bike front/rear light. Aluminum alloy material, durable to use and has excellent thermal conductivity. Integrated design with good sealing craft ensures excellent waterproof performance. 4 lighting modes(strong, weak, slow flash, strobe). Small size and easy to carry, large lighting range. Type: Bike Light Material: Aluminum Alloy, Engineering Plastic 4 Modes: Strong, Weak, Slow flash, Strobe LED Quantity: 3 LEDs Battery: Built-in Lithium Battery Features: Waterproof, Rechargeable, Bright LED Size: 5.3cm x 4cm x 4cm/2.09" x 1.57'' x 1.57'' (Approx.) Notes: 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 Bicycle Light 1 x USB Cable 1 x Tie Strap