Thanks for your attention. Today， we would like to recommend you this 5mW 532nm Starry Sky Green Light Laser Pointer with LC16340 Battery + Charger Black. Made of top quality zinc alloy， it is durable for long-term use. It is easy to operate. Gypsophila light pattern provides you with a sense of roman. Only need to push the button， and then you can see strikinggreen starry sky of light shoot forth. Besides， the light can point at any targets， such as photos， blackboard， video monitors and so on. Except that， it is perfect for teachers， professors， doctors， managers， engineers and so on. Take one for your daily use!                                    Features            Made of high quality zinc alloy， it is durable enough for long time usingStarry sky light type makes it distinct from othersIt can offer a wide and clean view from the farPerfect for teachers， professors， doctors， managers， engineers and so onPower-saving， compact and reliableSimply press the button to activate thegreen laser pointer and release it to deactivateGreat for teaching， meeting， speech， training， remote indication， mountaineering expeditions and other outdoor activitiesInclude a battery charger and LC16340 bettery for convenient use                                                            Specifications             Color     Black      <br> Model     851    <br> Quantity     1 Piece     <br> Material     Zinc Alloy     <br> Laser Power     5 mW     <br> Wave Length     532 nm     <br> Laser Color     Green     <br> Output Mode     Starry Sky     <br> Excitation Mode     Optical Pump     <br> Working Mode     Continuous laser     <br> Working Current     350 mA      <br> Battery     1 x LC16340 Battery(Included)     <br> Range     800m    <br> Working Voltage     3.7 V    <br> Dimensions     (4.8 x 0.79 x 0.79)" / (12.2 x 2 x 2)cm(L x W x H)    <br> Weight     6.7oz / 190g     <br>                                                             Package Includes            1 x Laser Pointer<br>1 x Strap (17cm)<br>1 x LC16340 Battery<br>1 x Battery Charger (2-Flat-Pin Plug / AC 110~220V)<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.