I bought the Mosquito Repellent Bracelets because lately I'm working outside and I live in Florida. There isn't a shortage of mosquitoes and they seem to love me so I wanted to give the bracelets a try to see if they worked. They do work but I noticed I had to wear one on my ankle and one on my wrist. When I wore them this way it keep the mosquitoes away from me.When I only wore one on my wrist then I would get bite on my ankles and same goes for if I wore one on my ankle then they bite my arms. They seemed to last as long as the seller said. They said that the life of the bracelets would be 250 hours once the package is opened. They do have the smell from the all-natural clove, citronella, lavender essential oil. They are supposed to be safe for kids to wear which I thought was cool.