I purchased the 1000mW portable laser. Not only is it very high quality but it is FDA approved. There are many safety features to protect others from potential accidents. If the owner turns the key to off, removes the remote key, and closes the lens cover it is extremely unlikely a curious child could get into trouble with it. SKYlasers also shipped mine in a lockable case for even more security! The laser works extremely well as advertised. I bought the recommended two rechargeable batteries very inexpensively off eBay. In addition I would recommend ordering extra glasses for any other people who may be in the same room as you. Also make sure doors and windows are secured from any reflection of the laser beam. Lastly I had a little problem which we weren't sure if it was caused by someone turning the lens cover too far or if it was an assembly issue. Nevertheless, I shipped it back fairly inexpensively and SKYlaser quickly fixed and sent it back to me. I couldn't have been happier with their customer service. Actually I feel bad that I had so many questions even before purchasing my laser. Chris Chen was very helpful in helping me choose the best laser for my needs. Thanks again Chris. I would highly recommend SKYlasers for anyone interested in purchasing a very high quality laser for personal or professional use!!!!!!!!!!