The price of this product does not include special or general invoices. If you mind, please do not purchase. If you need a special invoice, please contact customer service privately It is recommended to use a No. 7 900mA rechargeable nickel-metal hydride battery, which can operate continuously for 9 hours with all functions turned on. 2. The laser safety tail light complies with international safety standards of Class IIIA, but should not be directed directly into the eyes. 3. The buckle features an adjustable locking ring (suitable for seatpost diameters of 20-26mm) 4. The LED light is a truly high-brightness LED lamp head 5. This product weighs 62.5g, excluding the battery. 6. Complies with IPX-II waterproof standards, resistant to raindrops at a 15-degree angle Laser tail lights ensure your safety while cycling at night The headlights are as clear as streetlights, with visibility exceeding 1 mile Low-cost 3A battery, uses standard AA batteries Equipped with a sturdy stand, a solid PC cover, and a durable LED light with an ultra-long lifespan (up to 100,000 hours) Warning: When not in use, the switch needs to be turned off Do not look directly at the LED light Please do not let children use LED lights alone (In order for the LED light to stay on, please replace the battery promptly.) If the product is not used for a long time, please separate the product from the battery Please use high-quality batteries, such as Energizer batteries, Duracell batteries, Shuanglu batteries, or Nanfu batteries! When inserting batteries, to ensure the light turns on, please do not mix new batteries with used ones This product is only slightly water-resistant (please wipe it clean promptly after exposure to rain and maintain it regularly), please do not use it for diving