Features: 1. It is used to point at any desired target on projection screen， video， etc. 2. It can be used for presentation， teaching indicator， etc. 3. Across the sky， leading you to find the stars in the clear nights. 4. Lightweight， suitable for putting in your pocket or handbags， easy and convenient to bring. 5. This high quality laser pointer adopts the latest technology optics and microelectronics. 6. Press-button switch at the bottom， no need to keep holding when use it. 7. Designed with purple color light， which is easier for you to find the target and outlight the key point. 8. Made of aerometal， more durable. 9. Designed with a hang rope， convenient to bring and you don't need to worry about lossing it. 10. The copper at the end is fixed by aluminium sheet， which avoids short-ciruit. 11. The handle is made of anti-slip material， which prevents the laser pointer pen from dropping down. 12. Designed with a waterproof sealed ring at the end， which keeps water from running into it. 13. With star cap， it can show variable wonderful patterns at night. When take off the cap， it is a single beam pointer pen. 14. With an extended tube， it can be taken off to suit different needs. 15. Focusing the match(focus export to the maximum)， and then from the outlet of the light 7~13cm， move back to find the focus can lit a match. 16. Power-saving: with a key to lock the laser to avoid power loss -- when the key points at the red point ~ lock (green point~unlock). Note: 1. This laser pen is powered by 1x18650 battery(with the extended tube/ 16340 battery (without the extended tube) (battery is not included). 2. Negative pole -- inward Positive pole -- outwardSpecifications: 1. Body material: Aerometal 2. Dimensions: 126x22x22mm(without the extended tube) /158x22x22mm(with the extended tube) 3. Beam style: Continuous line. 4. Power supply :1x18650 Battery(with the extended tube)/ 1x16340 battery (without the extended tube). (Not included) 5. Wave length: 650nm 6. Laser range: 200~5000m 7. Laser color: Purple 8. Focus mode: Adjustable 9. Body color: Black 10. Working voltage: DC=3.0-3.7V. 11. Waterproof: IPX67 12. Preheat time: < 3seconds. 13. Working temperature: +15℃～＋35℃. 14. Storage temperature: -10℃～+40℃. 15. Charging time: 3~5 hours 16. Spot size:6M place <φ10mm. 17. Power：0.5mw Warnings: 1. Avoid direct eye exposure to laser beam -- exposure to the eye can cause permanent damage. 2. The laser is bright even in normal temperatures and daylight， so it is recommended to limit it to 30 seconds or less per use to avoid heat buildup. 3. Please keep this out of the reach of children. 4. When not in use， it is always a good idea to remove the battery -- it is is a good way to ensure children do not have access to it. 5. In some countries， laser pointers such as this may be illegal to own and/or use (especially the higher powered ones). Therefore， by purchasing these products YOU (the customer) accept all responsibly and liability to determine and fulfill the requirements and limitations of use or resale of these products in accordance with your country's laws and regulations. In the event of resale， you also agree to include this notation in the product description， so that any potential buyer can also make an informed purchasing decision.Package include 1 x Purple Laser Pointer 1 x Star Capter 2x Keys Note: Battery is not included.