Anyone who has a disability or is afraid of being attacked should own one of these.
My neighbor (woman) has fallen in her driveway twice in the past year and has laid there injured for hours with no one noticing.
Her driveway has about a three foot wall against it and people could not see her. She also hollered for help, but no one heard her.
I purchased two of these, one for the neighbor, and one for my wife. They are quite loud and I hope when either has a problem
someone will come to their aid.