Pay attention to this 1mW 405nm Blue &amp; Purple Laser Beam Single-point Laser Pointer Pen Silver. It can produce bright light in the dark. Equipped with high-performance diode， this laser pointer pen works better. In addition， when it focuses somewhere， it can produce blue and purple light. By this way， you are able to highlight the most important place or part you want to. It is ideal for professional use such as teachers， astrophile， guiders and so on. Overall， this laser pointer pen can meet your demands perfectly.                                    Features             Perfect for teachers， professors， doctors， managers， engineers and so on<br> The laser can be seem as far as the eye can see<br> Power saving， compact and reliable<br> Simply press the button to activate the laser pointer pen and release it to deactivate<br> Lightweight and handy design， it is very convenient to put in bags or pockets<br> With single-point design<br> Point at any desired targets on projection screens， video monitors， and presentation graphics   <br>                                                            Specifications             Key Words     Blue & Purple Laser Beam    <br> Light Color     Blue & Purple    <br> Light Style     Single-point    <br> Body Color     Silver    <br> Material     Aluminium Alloy    <br> Wave Length     405nm    <br> Output Power     1mw    <br> Battery Configuration     2 x AA Batteries (Not Included)    <br> Switch Location     Side    <br> Strap/Clip     No    <br> Beam Range     200-1000m    <br> Dimensions     (6.18 x 0.55)" / (15.7 x 1.4)cm (L x Dia.)    <br> Weight     0.71oz / 20g     <br>                                                             Package Includes            1 x Laser Pointer Pen<br>