Laser Technology Range Finders Impulse 100 Laser Rangefinders with Red Dot Scope 7003000 Model: EE. These reflectorless lasers are specifically designed for optimal performance under whatever conditions you might encounter in the field. Laser Technology Impulse 100 Laser Rangefinder is lightweigh extremely rugged completely waterproof and versatile. Use Impulse 100 Laser Rangefinder 7003000 as a handheld unit or mount them on a tripod for added stability.