Didn't work in my Wolf range hood
928091
Didn't work in my Wolf range hood, which has a two-position brightness switch. They work fine on HIGH but don't come on at all on LOW. Of the five kinds of LED bulbs I tried, these are the only ones that wouldn't come on in the LOW position.
3290489
did not fit at the battery like the photo shows. (hood would not close) In order to remotely mount it, plan on purchasing 2 extra battery cables.  Now that it is connected, it woks great
3639929
Didn't really work for me but then again I am not an animal calling expert and maybe it takes practice to get the tones down. My neighborhood crows flew away and my neighbors thought I was nuts.
2714577
I deer hunt and use these in my hunting blinds.  This brand didn't last long before it wouldn't stay lit. I finally replaced with a different brand.  When first igniting, it would make a loud whistle noise, which isn't good for being quiet in the woods.  Eventually, it stopped staying lit and would keep going out.  I've used other brands before without any issues.
579970
I wanted this to work.  But it didn't. I had some rusted screws on my car holding in the license plate lights that were stripped and rusted.  I put WD-40 on them to loosen them up a while back.  I took the smallest bit, used the cutting side to prepare it, flipped it to the removal bit side, and the bit turned but not the screw. It didn't bite into the metal at all -  it just made a bigger hole. I double-checked my approach and confirmed that i was using the drill in REVERSE mode.  I also tried it again with plenty of pressure to help encourage it to bite, but it wouldn't. With the holes growing in size, i moved up to the larger bits, all the way to the biggest one, and nothing worked.  Seriously disappointed.  Perhaps others will have better luck, but this is what I bought them for, and they didn't do the job.
4793531
should work but didn't. to far away from anything I guess.
3372292
I have 2 dogs, and only one is a nuisance barker. I was hoping to use this indoors to deter her from barking without driving my other dog too crazy. It did not deter her and drove the other dog completely crazy. I put it on the lowest setting, which should be the least sensitive. It was constantly going off from just ambient noise and talking. My non-barker seemed to be having a panic attack and his heart was racing. I'm returning this item. This is the first time I've ever returned something to Amazon. I'm now considering a citronella collar for the nuisance barker. Perhaps this would work better outdoors, but indoors it will be constantly going off.
663509
I tried to make the Hunter 44860 thermostat work for two days and called Hunter technical service 3 times and nothing helped.  The fan would turn on and stay on for hours cooling the house way below the set temperature.  The only way I could get the 44860 to work was to disconnect the green fan wire "G" from the Hunter so when the furnace heated the house to the set temperature the gas would turn off, the fan would stay on until the furnace combustion chamber cooled and deactivated its furnace fan switch then it would turn off like it should.  I gave up and returned the Hunter 44860.
1245133
The opening does not match with Ancona Stainless Steel 450 CFM Built-In Range Hood, 28-inch as recommended as buying pair option.  I had to hire someone with a metal cutter to resize the opening to fit in the hood.  Between the guy  I hired and I, we made it work!
2951781
I had no luck with this item. I placed it within the specified distance from my neighbor's annoying dogs. They kept on barking. One of them was within feet of it and it had no effect on him. I turned it several ways and I still don't see it being effective. I don't know how other people had a positive experience with this, but for me, it was a giant waste of money. Now I'm back to the drawing board and very disappointed.
64813
Not wiring up to my hunter system. Getting frustrated with it. Going to give it 1 more try tomorrow.
105525
Did not work for me. I was terrorized for weeks until my building brought in an exterminator. He laid down old-fashioned snap traps and my problem was solved in a few hours. I tried being "humane" to no avail. At least with the snap traps, pests are killed instantly.
1147506
I bought this collar in hopes that it would at least reach 100-200 meters since the advertised range was 300 meters, unfortunately the unit i received only worked out to about 30-40 meters. I tested it on a nice day in an open parking lot with a full charge in both the remote and collar, the best way i could get it to work was to point the received towards my dog and hold the activation button but even then it was sporadic and if i lost line of sight it did not work.

If you are looking for a cheap collar to use indoors or in a fence back yard this would work greatly, but i am looking for a unit that will reach farther than 45 yards.
3561538
I purchased two Bell + Howell 50104 Motion Activated Ultrasonic Solar Powered animal repellers with Rechargeable Batteries to thwart raccoons raiding my sweet corn. I charged the batteries for two days, as suggested, before installing them in my garden. On the way to the garden, I aimed both at our housecat and she just returned a blank stare. The red lights come on when motion is detected within the field of view but I cannot discern if any sound is emitted.  As far as I am concerned, the items are useless, unless I mount them on the outside of our home to try to fool trespassers from approaching.

I cannot recommend this item.
745
might work where you live but it was useless at my house.
I may try to get an extension and move it higher or a better spot as my RV antenna gets good reception but putting it high on my bedroom window was a bust.
4675266
This was a must in a recent range hood installation as the damper on the external blower unit did not have a good seal.  The unit has very lightly sprung hinged butterfly dampers, that are normally closed.  People comment that it was not working (because the springs are very soft) but when installed properly in a horizontal run of exhaust pipe, the dampers are easily opened by the exhaust fan but close when not in use and if the wind tries to push in or the the house is slightly depressurized by wind or another appliance the damper is pulled closed.
560017
I have a GE gas range and these knobs fit on the stem - but the knob has a side wall which prevents pushing the knob in before turning.  They just do not work - no way around it.