I ordered one of these sirens from them and when I got the siren in the mail, it didn't even work. Why ship a siren that doesn't work. When I called customer service to get a new one, they first denied that it was there siren then said they wouldn't have one for two months. When I asked them to make sure to test to see if it works, they said they have no way of figuring out if it will work. Poor customer service and poor quality. Never going to buy from them again.