Bird-X Balcony Gard, Ultrasonic Bird Preventer, Outdoor Bird Decoy with Motion-Sensor, Easy to Install, Covers up to 900 sq. ft., 15 to 25 kHz Frequency, 6.75" x 5.5" x 3.5"

I was really stoked on this find until I plugged it in. It definitely hurt my ears, so I adjusted the frequency to be outside of my hearing range. The birds didn't seem to be as annoyed as I was, given that they didn't move an inch. I then did a quick Google search and found that birds don't hear super high frequencies very well. I think Google claimed that their hearing tapers off at around 10kHz. I was unimpressed to say the least, and have started the return process. The most annoying part was that the motion sensor isn't sensitive enough to detect the birds, even when set to the highest sensitivity. So essentially, I'd be the only one getting pestered if I decided to leave it in place on the motion activated setting. 😐

I have a seldom used large upstairs patio that the pigeons and doves had taken over. Not only was it the annoying noise they made, but the horrible mess with droppings and feathers all over the bannisters and deck furniture. I tried everything…fake owls, bird tape, wind chimes, hanging devices that reflect sunlight, nothing worked. I was at my wits end when I came across this product online. I was skeptical since nothing had worked so far. But from the moment I installed this device, the problem was solved, the birds have never returned! The fact that the device can work with batteries or with the extra-long included electrical cord was also a plus. Being able to change the frequency if the birds get accustomed to the current one and it loses its deterrent effect is also a nice touch. This product does what it says! Finally, peace from these birds!

Why did you pick this product vs others?:I thought this was going to be the perfect solution for keeping birds off of my very small porch, but they come and go like nothing is there at all! I keep the batteries fresh and the settings as high as they can go. I caught one on my front door camera this morning just fly right past it to the wreath on my door. The search continues for an effective product.

This review is from my personal experience having this product for only a few days. I bought the Bird-X Balcony Gard hoping to keep pigeons and blackbirds off my back patio. Setup was easy, and I appreciate the motion-sensor activation. It does seem to deter some birds, but not all—particularly the more stubborn ones. The ultrasonic frequency is silent to humans, which is great, but its effectiveness seems hit-or-miss depending on the species. I noticed a slight reduction in bird activity, but they still linger occasionally. For the price, I expected a bit more consistency. It’s a decent option if you want some kind of deterrent, but don’t expect a miracle solution. It is essential though to prop it at least 3 feet from the ground. Initially I only put it about 1 foot and it didn't work at all.

I use this as one method to keep the birds away as they were destroying my paint on my cars which had cost me about $1000 in repairs. With two owls, holographic tape, sticky bird caulk it did the job, This was the last thing I tried since all the others only got me 80% of the way. Some birds might sit on my owl head mocking me, other sit above the holographic tape. But those were only minor players. I wanted to stop birds from my neighbors house that nest in spaces in the house that should be sealed. The birds would fly in and out over my cars and the neighbor, to say the least is less than helpful. This device stopped maybe 99% of the fly overs. It is unpleasant for them to hang out near my cars now. Much less birds. To the bird, the shinny cars look like lakes and a good spot to splat bird droppings.Inside (in the back under the plastic push on cover) is a frequency control and range control, and a jack for the 9V adapter and place for 4 C batteries and power switch (battery or power jack). When it is triggered, a red led lights in the sensor and it makes as short audible twerp (plus the actual sound that continues) . I like it but there are some down sides. First off the frequency control adjust differently if you use the adapter (starts I think at the 15000 hz) than the batteries (6V) which I believe is somewhere around 14000 hz. Though it may actually be between 17.5-18.5.This is because there is no voltage regulation internally. As the batteries wear out the frequency drops from where you set it, until it finally goes insane making crazy noises. I also notice it was temperature sensitive as to the frequency (in the cold it drops) and goes crazy. Let me tell you why this important besides being annoying. There is a device named the Mosquito which is used at train stations and parking lots that is teenagers hear that is annoying and they do not hang around. This is a costly item. This device with the batteries, send out the 14000 hz signal (or 17.5-18.5) and above or lower with the batteries . So it can be used for the same purpose on the cheap and I can tell you it works. It can be adjusted that teenagers, some women, and other ages hear it. I had to have my neighbor's kid stand there so I could adjust it so he could not hear it as he could hear it 25 ft away through an open window. Those frequencies do not go through walls - only openings. As the batteries died, it would swing the frequency down back into the torture range! A food delivery person once came and he was holding his ears in pain (he was 3 ft away) and was saying what is that, what is that , it hurts, while I heard nothing. He was running away as I gave him his tip. So point is human beings can hear a tortuous sound if it is set to too low a frequency. But maybe that might be want you want. The device sold to chase teenagers costs between $300-500 so this is so much cheaper if that is your purpose. As far as bird again, I find it really does work.I have this strapped to a fence aimed over my driveway it so far with all the things I have done, no bird droppings. This device is best used with the power adapter which has quite a long cable. In my case, I am going to devise a way to run it on solar as not to deal with the batteries. The battery life is based of course on how many times it is triggered. Since people and animals trigger it, it can be going off quite a lot. Constant on, can only be done when it is on the AC adapter.OK, all said, I can say this thing does work for me. I actually bought two of them and I have not even needed to use the second one so far.

Great item! Does exactly what it is intended to do. We were having an issue with barn swallows trying to build a nest on our front porch. They are a protected species and once their nest is built and they lay eggs, you can’t touch them. We tried everything. This was the only thing we hadn’tyet tried. It works!

Total waste of money. This device claims to repel birds with some kind of frequency, but the only thing it’s doing is giving them a new hangout spot. The birds literally sit on top of the machine like it’s a bird spa. I’ve seen them chilling there, unbothered, like they own the place. One even looked like it was mocking it. Complete scam – save your money and skip this useless gadget.