They seem to block negative reviews. I have attempted a few times, so I know this is the case. My laser is 50,000 green laser. It has a cycle max of 30 seconds. I typically use 10 second bursts so as not to get even close to the 30 seconds. It was very bright, but after 3 months, of say 12 times using this laser, it no longer works. The take away is that these are not durable toys. It took over a month to receive this laser.