Please Note That when you get laser, you will see it is 1mw on the sticker of the laser while we describe it as 5mw in our listing. Please dont think you got a wrong laser. In order to avoid custom problem, we will have to put it as 1mw on the sticker. Thank you for your understanding.Important Note:1.After putting the correct battery, please use the key to unlock the laser firstly and then press the button. If the laser fails to work, please flip the battery to try again. Sometimes, it will work if you flip the battery ( put the battery oppositely ),2.The Red laser pinter pen was influenced by temperature.In winter, if temperature is low outside of room, please warm up the laser pen for 5 minutes,3. Avoid direct eye exposure to laser beam,4.Please don't keep open for a long time, otherwise easy to damage the light bulb,5.If you want to light match, please adjust the focal length to the largest , and then match at a distance of approximately 10cm from lamp holder , the most part of the light, at first might do not know how to play, but the fact we tested it completely no problem to light match.Features: Color:Red 100% brand new high quality and perfect design. Actual photo shown,Simple and easy to use. Use your laser pointer to point at any desired targets on projection screen, video. Across the sky,allowing you to find the stars in the fan days you want the stars,is the leader in the vast sky. Power saving, lightweight, suitable for putting in your pocket or handbags. This laser pointer can be used for presentation, teaching indicator, children amusement and more. This high quality laser pointer adopts the latest technology optics and microelectronics. Power supply: 1 x 18650 Battery. Focus mode: adjustable. Body material: aerometal.Specifications: Wavelength: 650nm. Beam style:continuous line. Spot size:6M place Working voltage:DC=3.0-3.7V. Preheat time: Working temperature: +1535. Storage temperature: -10+40.Package(Note:Without Retail Package):1x 2 in1 Red Laser Pointer Pen1x 18650 Rechargeable Battey1x Smart Charger