Giving out green， this 5mW Focus Starry Pattern Green Light Laser Pointer Pen with 18650 Rechargeable Battery Yellow is perfect for professional use. With high-capacity 18650 battery， this laser pointer pen can work for long lasting time. It can produce starry pattern light. In addition， the focus design makes it much better. It can be used to point board， screen， and blackboard and so on. No matter where it points， this green starry pattern can stand out from others. It is also a good way to create romantic and warm atmosphere. Under the help of this practical and cost-effective laser pointer pen， you are able to enjoy your presentations easily. It will be an optimal choice.                                    Features            It can be focusedProduce green starry pattern lightMade of high quality material， so it is enough durable for long time usingThe laser can be seem as far as the eye can seePower saving， compact and reliableSimply press the button to activate the laser pointer pen and release it to deactivateLightweight and handy design， it is very convenient to put in bags or pocketsIt’s more convenience that use laser to point to the target instead of handsPerfect for teachers， professors， doctors， managers， engineers and so on                                                            Specifications             Output Power     5mW    <br> Wavelength     532nm    <br> Light Color     Green    <br> Focus     Yes    <br> Power Supply     1*18650 Li-ion Battery    <br> Body Color     Yellow    <br> Weight     15.31 oz / 434 g    <br> Dimensions     7.20 x 0.91" / 18.3 x 2.3 cm (L x Dia)     <br>                                                             Package Includes            1 x Laser Pointer Pen<br>1 x Battery Charger<br>1 x 18650 Battery<br>5 x Pen Head<br>