Laser pointers powered by aaa battery are available from 405nm to 650nm lasers. It covers purple laser pointer , blue laser pointer, green laser pointer, red laser pointer. These lases' output power are common less than 500mw. Such lasers emits a soft laser beam that can be used at classroom, office for pointing. All of them are cheaper than high power laser pointer . Get this kind of laser pen at htpow, and we will send free AAA battery kit with your laser pen .