BenRan Bicycle Light Set Super Bright 5 LED Headlight, Waterproof Taillight, Quick-Release EASY TO SET COMBINATION size: 5 Feet x 1/2 Inch 4-digit combination locking mechanisms for keyless convenience with a FREE mounting bracket for easy transportation. (The mounting bracket is suitable for bike's tubing or seat post diameter is 1" and don't over tighten the screws) Front light powered by 4 * AAA batteries, taillight powered by 2 * AAA batteries (NOT included). Includes a front light with 5 ultra bright white LEDs and a taillight with 3 LEDs. and Bike Lock Cable Multi-function front light: bike front light or torch. 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.