Strauss Bicycle Zoom LED Torch with Mount Holder and Bicycle Bottle Holder (Black) You can use 3 x aaa battery or 18650 battery for the flashlight. Zoomable effect manually "zoom" the light by extending the flashlight head outward, the more you extend, the more narrow, focused, and brighter the beam will be No tool needed - the clamp of the bottle cage is designed for easy to installation and remove, no tool needed High-quality the torch is made of solid aluminium and reflector by rugged abs plastic Versatile and practical - this bottle cage is available for being fixed onto any bars, such as handlebar, down tube, fork, front pipe of bike Expanded size - this quick release bottle cage fits for most standard-sized water bottles. 2.5 inch - 3.3 inch bottle in diameter