Saw this on Shark Tank and it seemed too simple to really work but intriguing enough that we bought it. We are kayakers and are outside regularly and get bites from mosquitoes and fire ants. So, once the product arrived , I was almost excited about getting a bite to see if it would work! Didn’t have to wait to long, and I used it immediately after a bite...and WOW! I was shocked. This thing really works! Recommended it to all our kayaking friends!!