I haven't bought the product and I am sure it has good purposes. But there needs to be a warning in the beginning of the commercials about the flash before it starts. That fast of a flash affects those who are epileptic. I myself have seizures that can be triggered by flashes and have to avoid movies or turn away from fire trucks lights, police cars and etc. This was the fastest flashes I ever saw. Please be caring enough to warn ahead of time.