Love the whistle and think it's a good product. Barrow's customer service is poor at best. Their website states they will respond to inquiries within 12 hours, that is untrue. I've sent 3 messages to customer support regarding getting replace silicon mouthguard for the whistle and have not received the courtesy of a reply.
Very durable I love the distance that this whistle carries.
Wish these were just a tad bit lighter, or smaller. My 35 lb dogs are retrieving them, but they do seem a little heavy for repetitive training.
I have one on each lanyard. They have a clear crisp sounds dogs gear and easy on my ears!!