BenRan Bicycle Light Set, Super Bright Bike CREE Q5 LED / 5 LED Headlight , waterproof Taillight, Quick-Release Includes a front light with 5 ultra bright white LEDs and a taillight with 3 LEDs Front light powered by 3 * AAA batteries, taillight powered by 2 * AAA batteries (NOT included) Multi-function front light: bike front light or flashlight. Corresponding handlebar diameter: 18-31mm Front light's ON / OFF switch with 3 modes: steady light and flash; Taillight's ON / OFF switch with 3 modes Weather resistant, easy installation, no tool required. Mail contact us, there are any problems within 6 months, we will give you a free new light ! November 7,2016 notice, thank you for your choice !