This item comes with three separate AAA batteries (sold separately) already installed. No tools are required for immediate installation and use. I purchased the main unit and batteries on September 4, 2025, and am selling it after using it for about 40 minutes because I replaced it. I dropped it during installation, and it has some scratches, but it does not affect the light's functionality. Shipping will be via Yamato Transport's Takkyubin Compact service, and will be sent anonymously. For installation instructions, please refer to the easy-to-understand video on the Sagisaka website. ■ Product Name: Compact LED Light ■ Color: Black ■ Product Code: 44501 ■ JAN Code: 4973291445019 Photos 1-3 are from the website. Photos 4-6 are of the actual item. ● Brightness: Approximately 800 candela (approximately 8 lux) ● Modes: Steady on, slow flashing, fast flashing ● Continuous lighting: Approximately 40 hours ● Continuous flashing (slow): Approximately 80 hours ● Continuous flashing (fast): Approximately 100 hours ● Power source: 3 AAA batteries ● Compatible handlebar diameter: 19.1mm - 25.4mm ● Waterproof function: IPX3 (splashproof) Size: Body (approx.): Length 90mm x Width 28mm x Height 28mm Color: Black Capacity/Weight: Approximately 55g Price at purchase: 1,680 yen Thank you for looking.