Source: https://www.amazon.com/PetSafe-Bolt-Interactive-Laser-Cat/dp/B0021L8W6K/ref=as_li_ss_tl?s=pet-supplies&ie=UTF8&qid=1494487209&sr=1-4&keywords=laser+pointer&linkCode=sl1&tag=hapjacrus-20&linkId=bb2971e1fcee1e6b5e49d9ec954ac1b3