Features: . 1. It is used to point at any desired target on a projection screen, video, etc. 2. It can be used for presentations, teaching, and other instructional purposes. 3. With star cap, it can project variable patterns at night. 4. When the cap is removed, it functions as a single beam pointer pen. 5. Ideal for stargazing, helping you identify stars on clear nights. 6. Lightweight and compact, suitable for carrying in pockets or handbags. 7. This high-quality laser pointer incorporates advanced optical and microelectronic technology. 8. Emits a green laser beam, which is highly visible and effective for highlighting key points. 9. Constructed from aluminum alloy for durability; features an anti-slip grip to prevent dropping. 10. Includes a lanyard for convenient carrying and to help prevent loss. 11. Features a waterproof sealing ring at the end to protect against moisture. 12. Power-saving design with a lock function to prevent accidental activation — align the key to the red dot to lock (green dot to unlock). Important: 1. After inserting the correct battery, use the key to unlock the laser before pressing the button. 2. The laser pointer may be affected by temperature. In cold conditions, allow it to warm up for 5 minutes before use. 3. Avoid direct eye exposure to the laser beam. 4. Do not leave the laser on for extended periods to prevent overheating. 5. Children should only use the laser under adult supervision. 6. This is a high-power laser and may consume power quickly. Do not operate continuously for more than 2 minutes to avoid internal damage. Note: For regulatory compliance, the label indicates an output power of less than 5mW. The actual output power exceeds 5mW. Thank you for your understanding. Specifications: Item Type: Laser Pen Model: 303 Body Material: Aluminum Alloy Laser Color: Red/Purple (Optional) Housing Color: Black (Optional) Size: (Dia x L) 2.3 x 16cm / 0.9 x 6.3in (Approx.) Power Supply: 1 x 18650 Battery (Not included) Beam Style: Continuous line Spot Size: 6M Lifespan: 8000 hours Working Voltage: DC 3.0-3.7V Preheat Time: < 3 seconds Operating Temperature: +15°C to +35°C Storage Temperature: -10°C to +40°C Output Power: 5mW Quantity: 1 Set (other accessories shown in the picture are not included) Note: 1. Conversion: 1cm = 10mm = 0.39 inch 2. Please allow 0-1cm measurement deviation due to manual measurement. Ensure you are comfortable with this before purchasing. 3. Due to differences in monitor displays, the image may not reflect the actual color of the item. Thank you! Package Includes: 1 x Laser Pointer Pen 2 x Keys