GREEN LASER PEN
STANDARD AAA BATTERIES: Batteries Included
--Guidance guide for outdoor sports, travel, tourism, mountain climbing, etc.
--Instructions for teaching, lecture, sales, museums, exhibition halls, venues, etc.
--Signal instructions for factories, mines, construction sites, natural disasters, life-saving rescue, etc.
--Astronomers and amateurs navigate the vast stars.
--Take drones down
--Other applications may apply :)