This new family of laser lights is the best personal safety equipment introduced this year! The size of small flashlights and powered by AA or the included lithium batteries, these lasers have a night-time range of up to 20 miles! And they are eye-safe, and can be used to signal to aircraft. Light in weight at between three and six ounces and built of rugged aluminum, these have a quality look and feel. I did a personal test and immediately bought two. In three sizes with red and green lights priced between $100 and $200.