If you want to buy a laser pointer pen， please come to browse this 5-in-1 5mw 405nmPurple Laser Beam USB Laser Pointer Pen with USB Cable and Laser Heads. Itsbuilt-in laser module canimprove the heat dissipation equipment. Moreover， it has stylish pen shape and lightweight size， providing great portability. With top-grade copper material and rubber paint surface treatment， itis comfortable to grip. Use the laser pointer to point at any desired targets on projection screens， video monitors， and presentation graphics. What a multifunctional laser pen， andyou should not miss it!                                    Features             No need to install battery<br> With laser heads and USB cable attached<br> The built-in laser module can improve the heat dissipation equipment<br> With circuit board protection design<br> With stylish and lightweight pen shape<br> The built-in lithium battery and USB cable let you charge it conveniently<br> With top-grade copper material and rubber paint surface treatment， it is comfortable to grip   <br>                                                            Specifications             Key Words     Purple Laser Beam    <br> Light Color     Purple    <br> Body Color     Silver    <br> Material     Fine Copper    <br> Surface Treatment     Rubrones    <br> Wave Length     405nm    <br> Output Power     5mw    <br> Battery     Built-in Lithium Battery， USB    <br> Voltage     DC 3V    <br> Perfect Working Environment     0-35°    <br> Switch Location     Side    <br> Strap/Clip     No    <br> Dimensions     (5.91 x 0.59 x 0.59)" / (15 x 1.5 x 1.5)cm (L x W x H)    <br> Weight     1.62oz / 46g       <br>                                                             Package Includes            1 x Laser Pointer Pen<br>1 x USB Cable<br>1 x User Manual<br>4 x Laser Heads<br>                                                            Extra Info            Note: Don′t allow the laser beam to enter the eye. The laser beam is harmful to eyes， any contact will cause permanent damage. Not the laser point to the crowd， especially in the face.Don′t look directly with your eyes or using binoculars and other equipment to observe the laser beam on the remote control. Never let the laser point to a mirror or other highly reflective surfaces.Please keep the laser pointer away from children (especially the high powered ones) in order to avoid the damage by the children′s contacting.Please don′t light laser pointer continually in 30 seconds and press the button hard， it will affect its lifetime for prolonged use.Please remove the battery from the laser pointer when not in use.Need to disassemble， adjust or repair， please get professional maintenance technicians.The use of laser pointers (especially the higher powered ones) may be illegal in some countries. Therefore， customers can buy and use it by following the local laws and regulations. In the event of resale， you also need to incorporate this notation in the product description， so that any potential buyer can be well informed before making purchasing decision.