This is the LATEST TECHNOLOGY Green dpss Rechargeable Battery Powered Laser. This unit is machined from SOLID BRASS and ALUMINUM - and it is powered by a SINGLE CR123A Lithium Ion Rechargeable 1AH@3V Battery. Two Rechargeables are supplied. This uses a VERY HIGH POWER >>> 9mm - 808nm IR Laser Diode (500mw)open can diode design that pumps a Yttrium Vanadate Neodymium Doped Crystal to create 1064nm IR and the wavelength is then doubled by a KTP Crystal. THIS LASER WILL BURN SKIN AT CLOSE DISTANCES and IS USED for Laser Accupuncture at ranges between FRONT SURFACE to 1M with a scanning motion of the beam. This makes an impressive TEACHING TOOL in the laboratory and classroom environment. NOTHING LIKE GREEN LASER POINTERS that are all over rated and rarely come up to specifications. The Button is Hold/Push to activate with NO CONSTANT ON due to power output. The laser comes Boxed with a Multivoltage 110V-220V Quickcharger that charges 2 cells in 2 hours. YOU MUST BE OVER 21 YEARS OF AGE TO PURCHASE THIS ITEM and to complete sale you will have to supply valid proof of such in form of Driver's License copy sent to us or similar photo I.D. stating your age. You are required to register it with the FDA as a CLASS IIIb Laser Device if you intend using it in a Medical Professional, University or Lab Environment due to the output power. WE CERTIFY THE POWER OUTPUT on every one of these sold. We also have available 80mw units and 65mw+ units and 55mw+ units ALL of which are Certified for Power Outputs. There is absolutely NO FALSIFYING OR MISREPRESENTATION OF PRODUCT, and Every Previous Purchaser has been EXTREMELY PLEASED with the OUTPUT and QUALITY of this Portable Laser. The FOCUS CAN BE RESET. Acceptable forms of payment include either PAYPAL or PERSONAL/COMPANY CHECK or MONEY ORDER. Shipping to the 50 states to include Insurance + Delivery Confirmation is: $18.00 and to Canada and Europe and U.K. and Australia is: $30.00 to include REGISTERED MAIL U.S. AIR DELIVERY - no insurance. The seller assumes NO PERSONAL RESPONSIBILITY REGARDING THE FUTURE USE AND APPLICATION OF THIS FDA CLASS IIIb LASER DEVICE. A GREAT LASER FOR POINTING OUT THE STARS AT NIGHT !!! Frankly? BUY NOW - DON'T WAIT! Dollar against foreign currencies is sinking and These Units are ABSOLUTELY PRIME STUFF! The photo showing the beam is NOT RETOUCHED - It is apx. 2 feet from a wall in our facility. These ALL HIT OVER 125mw+ of Actual Green 532nm Output not counting any IR Infrared! The sustained duty cycle is 90 seconds on maximum followed by 2 - 5 minutes of cooling time depending on ambient external temperatures. - d.k.a./scientificos