Description: 1. With the conventional 7th battery, it is recommended to use a 900mA rechargeable NiMH battery, which can work continuously for 9 hours with full function. 2. The laser safety tail light adopts the international safety standard Class IIIA, but do not direct the eyes. 3. The buckle adopts an adjustable lock ring (suitable for diameter 20-31mm seatpost diameter). 4. Five LED lights are true high-brightness LED heads with excellent brightness. 5. It meets IPX-II waterproof standard and is inclined to 15 degrees raindrop waterproof. Specifications: Shell color: white, red, blue, green Battery: AAA battery. Laser color: 685 ± 5nm (red) Laser power: ≤5mw Weight: 64g, no battery. Appearance size: L80×W69×H33mm Irradiation range: 260° 5LED 7 mode: always on, flashing, slow flashing, slow to left to right, slow to right to left, flashing left to right, flashing left and right, off Laser parallel line 2 mode: always on, flashing, off. The thickness and length of the laser light on both sides of the lamp are different and will not be exactly the same. Package Included: 1* Bicycle Laser Taillight (without battery) Notes: note: This product does not have a battery. The lasers are all parallel lines. Please use a high quality battery. The switch needs to be turned off when not in use. Do not look directly at the LED lights. Do not allow children to use LED lights alone. If it is not used for a long time, please separate the product from the battery. (In order to make the LED light reach the brightest state, please replace the battery in time) When inserting the battery, do not confuse the new battery with the used battery in order to get the light to the brightest state. This product is only slightly waterproof (should be wiped clean after rain, diligent maintenance), do not use for diving.