Note: The batteries the laser pointer uses is 2 AAA batteries and for battery has a shipping problem so batteries are not included in the package so you need to buy two to have it work. Thanks.Specifications:Nobleness and grace、 the 5mw red laser pointer pen is very beautiful and compact~ Put 2 x AAA batteries here. 5mW red laser pointer is perfect for teachers、 professors、 doctors~ 650nm 5mW red laser is launched from here and laser is clear visible in the dark~ Mid-open switch、 for easy operate the 650nm 5mw red laser pointer pen~ High quality 5mW red laser pointer is bright、 solid and durable enough for long time use~Warning Attention please:When using the  laser pen you should never point a laser beam at a person!Package included: One laser Pen without battery.