FOX Unisex Elektronische (3 Tone) 40 Fluitjes, Zwart, One size

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I bought this to train some Jack-A-Bee puppies I have. Why?? Because I am mute due to my vocal cords being removed as the result of cancer. (Can't blow a whistle, even a match or candle out since I no longer breath through my nose or mouth) Prior to that it was very easy for me to train dogs, now I can and do use a series of hand claps for commands but if the dogs are a long distance away they can't hear that soooooo. This thing is loud, has one high pitched tone (pretty loud) , one whistle like chatter tone, and one LOUD High Pitched tone. Using those I can set a series of commands for Come, Stay, sit, down, etc. I explained the above just in case there is someone else that could use it that way. Now the actual whistle review: It comes with no instructions so here goes. The 9 volt battery comes sealed in a very clear plastic film that I at first missed, So it didn't work until that was removed. Haaa The battery door has a slide switch marked with an arrow for locking, pull it down to unlock the door, then lift the end the switch is on first, then slide it up and forward to release the bottom door tangs. It then comes off. Inside the battery contact points are marked + and -, make sure the battery terminals match those when inserting, and insert the bottom of the battery in the compartment first then the top. Then the bottom door tabs are inserted first, top then can be dropped flush and the door lock switch pushed up into the locking position. The on off and tone select switch is located on the side. All the way to the front is off, one click down loud solid tone, second click is the chatter or whistle sound third click down one LOUD Solid tone. I don't know how long it will last but the price and out of the box performance has impressed me enough to order a backup. Also at 70 years old it's fun learning a new skill. Haaa Hope this review helps someone.ADDENDUM: This thing is loud enough my dogs hear it 1/4 mile away (in the country) and respond,(working very well). The battery is holding up well . I have left the switch on three times for 24 hours and it's still good. ((Probably does draw a little power when left on though, so wouldn't do that). Only negative is the battery door switch has dropped down which will allow the door to come off. So I closed the switch and put a piece of Scotch Tape over it and no more problem. It works well enough that I ordered another one in case this one quits, and they no longer make them.

Very useful

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As a swimming coach , I have to give whistle starts , so many times ,It’s saves energy , normal whistle can give u throat pain as well lungs pain , but it’s superb to use and at least I’m not facing any chest pain after using this ,And ya it’s loud I’m using this whistle in 50 meters as well 25 meters swimming pool