Specification Available Ship to:United StatesDetails NOTE: Unlike other laser pens, this laser with a built-in battery, can be charged directly with a USB cable.   Instruction 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.   How to use 1.Take off the protective clamp from the power button., press the power button to turn the laser on. Be aware of that you need to keep pressing the button to keep the power of it. 2.Rotate the first head of the laser to change the pattern. 3.Take off the first head to get single beam and rotate the second head to change focus. 4.After use it, put on the protective clamp again and leave it where children can't reach.   Specifications Color:Green Power supply:this laser with a built-in battery Focus mode:Adjustable Body material: Aerometal Wavelength: 532nm. Power:1mw Beam style:Continuous line Spot size:6M place <φ10mm.> Working voltage:DC=3.0-3.7V. Preheat time: < 3seconds. Working temperature: +15℃～＋35℃. Storage temperature: -10℃～+40℃.   Package Includes 1 x Green Laser Pen 1 x USB cable