Please do not waste your money. These do not work. I have tried up to 5 in a room that had minimal odor and they couldn't even take care of that. If you insist on trying PLEASE buy a small quantity so you are not out too much money. Better yet, PLEASE take my advice and do not buy. Both my cousin and I ordered. She never got hers and it has been 4 months. When she calls she gets a runaround that they were sent out and to take it up with postal. I sent mine back and get an even bigger runaround. I know I am never getting my money back. I have called 6 times. Just have to make peace with that one. To add insult to injury, they were quite rude when I called. Wish I would have read reviews before purchasing. At least a good lesson was learned. Read reviews before purchasing an item you are not familiarized with!
Length of Use: 3–6 months
Bottom Line: No, I would not recommend this to a friend