Advantages: 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 bag 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.Designed with a hang rope, convenient to bring and you don"t need to worry about losing it.Specifications: 1.Surface: anodic oxidation 2.Size: 157 x 23 mm 3.Beam style: Continuous line. 4.Power supply :1x18650/ 16340 Li-ion Battery. (Not Included Battery) 5.Wave length: 532nm 6.Laser range: 200~5000m 7.Laser color: purple 8.Type of focusing: Adjustable 9.Body color: Black10. Working voltage:DC 3.0- 3.7V.1 1.Preheat time: Our products are made with the splendid quality materials and are designed to provide you with the best possible user experience.