INFINITER BRAND = SUPERIOR PERFORMANCE.- THE CHOICE OF PROFESSIONAL. INFINITER"S most energy-saving red laser pointer uses inexpensive AAA batteries that provide 40 hours of continuous run time. It is manufactured by Quarton Inc and backed by over 20 years of laser experience. It can generate a laser beam with ultra-bright light points up to a transmission distance of 500 meters. Simple to operate with a slender profile, which easily fits into a pocket or purse, the INFINITER 100 is the perfect product for business or classroom presentations. It is also a fun and useful product for those interested in astronomy. When not using it for work related jobs it is an entertaining and safe toy that will keep your cats or dogs busy for hours. Even though this is our most inexpensive laser pointer it is still built with the same rugged materials as some of our more sophisticated products. It is also subject to Quarton"s strict Q.C. standards and will provide you with many years of satisfying use. LASER SAFETY - A CRITICAL ELEMENT OF INFINITER BRAND PRODUCTS! INFINITER does not sell lasers over 5mW for two important reasons-First they are very dangerous and can cause blindness; Secondly they are ILLEGAL. Reference:www.fda.gov/Radiation. All INFINITER products are FDA approved, so you can be assured they are safe and meet INFINITER"s strict Q.C. standards. INFINITER BRAND = SAFE, SUPERIOR PERFORMANCE!