Sorry but if you don't know anything about it, you shouldn't own one. The pulses in those lasers are enough to kill you in a single hit if you touch something you shouldn't.
Right here. LPF is chock full of information on lasers... and if this is your first laser, STAY AWAY from anything over 50mW. It's too dangerous, and you could get arrested. If you are interested in laser safety in particular, this website will answer 99.99% of your laser safety questions: Sam's Laser FAQ - Laser Safety
Use the google search bar at the bottom of the page to get started researching info on the Forum. Good luck