This thing appears to only be a flashlight and red dot light. There is no setting for “sound only.” I tested my theory on both of my dogs by holding it over their heads pointed toward their tails so that they cannot see the light. They only reacted to the click of the switch with no other reaction to any “sound,” even when I held it on for 10–20 seconds. This thing emits no sound unless they cannot hear it 2 inches from their ears. Fraud/scam.
Pros and Cons:
Bottom Line: No, I would not recommend this to a friend
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