This thing is super cheap, My sirens work fine but when I ...
353160
You get what you pay for! This thing is super cheap, My sirens work fine but when I go to talk my voice goes in and out. The speaker is very loud and good but the mic is junk!
464203
I got this few weeks ago  and I chained my scooter up and I pulled it rite thru wen I checked it.  I just laughed.  Not worth the grief sending it back.  You get wat you pay for.  But iv always used masterlock.  Still my fault buying cheap junk.
4617290
I like that you can have it on a softer loud time and that the receiver can be moved around. It works great for retail. However if you ever drop it The solder job is so cheap that it will come loose and stop chiming. Sometimes you can fix it with electrical tape and a lot of patience and sometimes you just have to buy a new receiver. The receivers are very fragile don't drop them
1955475
Well, it's cheap, but it doesn't always turn on.  I guess because it's cheap...oh, I get it now!
915314
Please do not buy! I knot this is the cheapest transmitter out there, but please resist! I have had it less than a week and it is already dying with no amount of charging reviving it to full power, meaning while it is trying to stay alive, the frequency is going in and out and making a horrible sound.. Also, (very important), it does not fit in the hole when my phone case is on. So when I drive I have to take my phone case partially off before use. It took me a day or two to realize that. That is not standard as this is my third transmitter for my 99 Jetta (in general they do not have long lives I have realized but a week is ridiculous) and they have all fit on varying phone cases without a problem. I will be returning this.
3102734
I bought this so I could play music from my phone and talk hands free...after getting a ticket in CA and also wanting to drive more safely. My first impression when I unboxed the unit was that it was very cheap. The wires are an extremely small gauge (maybe twice the size of a paper clip as a reference) and I said to myself that these look like they will break (more on this later). Installing was easy and syncing was relatively easy although many times it did not sync requiring me to unplug and replug the unit. Annoying but not a huge problem. The hands free function was not great. I ended up not using it (risking getting another ticket or an accident) after my phone call recipients kept asking me to repeat things and informing me "you sound like you're in a wind tunnel."

About a month after installing the Kinivo it simply stopped working. Although I don't know exactly why, I'm guessing a wire broke in the cable. I was never careless or rough with the handling so I'm attributing this to the "cheapness" of the unit although it's certainly not priced cheaply.

Bottom line- look elsewhere for a bluetooth!
3425667
It is really cheap, but again you get what you pay for
2256945
I purchased this siren a while ago and am reviewing it now after giving it a good amount of time in service.

Initially when I purchased the system, there was a problem with the siren unit itself. I had it professionally installed and upon a few uses, the fuse blew after the unit overheated. Replacing the fuse did not solve the issue as new fuses would blow as well.

I contacted the seller and it was concluded that there was most likely a short somewhere in the unit itself. Seller promptly replaced the unit.

After swapping in the new unit, there have been no issues. When purchasing any item in general, there's always a possibility of a product defect. I always recommend contacting a seller in regards to a product defect as most would kindly help you with your issue in a timely manner.

-------
ONTO THE SIREN SYSTEM ITSELF:

PROS:

- Full Set - includes everything you need to get your siren working (minus the tools).

- Tones - 6 selectable automatic tones, 1 manual siren tone, and an air horn.

- Two on/off power switches - connect your emergency lights or anything to easily activate them when needed. Ex. Front and rear setup.

- Loud enough to move traffic (Approx. Two-thirds (2/3) the loudness of a standard car horn)

CONS:

- PA system is pretty much useless - The included microphone feels very cheap and performs horribly. If you don't care about the PA system, then this is a great siren set for the price; however, if you're looking for a functional PA, look elsewhere. The output from the microphone is very quiet and there's no way anyone will hear it while driving unless you scream to the top of your lungs.

- Volume control - The volume control seems not to function as displayed. There only seems to be 3 sound levels: off, quiet, "loud". Once again, keep in mind this isn't the loudest siren (~2/3 as loud as a standard car horn), but for the price it's worth it and works decently.

- Instructions - Very basic, if your knowledge is limited in wiring, I highly suggest taking it to get professionally installed by a mechanic.

Overall, this is a fairly well built siren system set. Both the siren and speaker are very sturdy and durable. Mounting brackets are included making installation easier for the siren.

I recommend mounting the speaker in a way which sound won't be blocked as you want to make the most out of the volume.

If you're on the fence on purchasing this siren, consider whether you're willing to spend more for a louder siren. If this siren fits your budget and you don't care about a great PA system, I would definitely recommend it.

Additionally, don't hesitate to contact the seller if you experience any issues, he's very kind and responsive. Thank you.
3662938
Cheap,doesn't work well. Remember you get what you pay for
617230
Bought this to check timing on a multitude of engines I'm working on.  I'm not a licensed mechanic, but I've been working on cars ever since my dad coaxed me to change the brake pads on a Mitsubishi Starion in 1991.  Its cheap, so expect cheap, low quality stuff.  It worked, so I used it.  It also broke recently, but if you're good with simple electronics you can fix it as I have.  If you are someone on a tight budget and in need of a timing light, $15 bucks is a whole lot cheaper than going to the local flea market in most cases.  If you can spend more than $25 on a timing light, you can get something that is as capable as this one.
4333541
So this clock feels cheap and like it would fall apart if I handled it roughly after angrily waking to its super loud bell.  I have to set the alarm away from my bed so that I have a moment to get my wits about me before I bash this alarm silent.  It will jolt you awake and I have found that I tend to wake up earlier in fear of this thing going off.
123013
I'm going to be able to make it work I added to latches for $4 that I bought at a home center. You have to put something like foam on top of the harmonicas or they will all fall out when you carry it. It arrived with a little stain on the Tweed. All in all extremely cheap product. If I had to do it over I would have spent more and got a hohner case.
1269316
I bought three of these at a local hardware store and boy are these things cheap! The plastic is so fragile that it's real easy to break while adjusting which I did, however not all was lost because I was able to use the sensor on a different fixture.

So I don't really recommend this but it does get the job done so it'll work if you're in a pinch.
What I do recommend it for is the sensor which you can use for other fixtures and creative purpose because a motion sensor with a built in photodiode is a pretty good deal for $12.

tl;dr edition: only buy it if you're interested in the sensor or can't afford anything with better quality.
3510640
This device is cheap. After one ride, this electric start was constantly trying to start my bike, even after the bike was fired up. I thought it was going to ruin my starter. After taking it apart I noticed that there wasn't a spring keeping the button away from the electric contact.
1679430
My TV remote for my RCA died. I bought this one super cheap and it came super fast. I had to press a bunch of buttons in a certain combination but once that was over it works. I could control more devices with it but their remotes still work.
1223542
A few of them only work when positioned just so. They were super cheap, so I'm not surprised.
3053454
For your safety, PLEASE DO NOT BUY THIS SIREN!! I recently purchased this siren for my POV Jeep Wrangler. I was going to pair it up with the Abrams 100 watt slim speaker included in this bundle. After installing everything, double checking all of my wiring, grounds, etc. I plugged the recommended 10 amp fuse into the back of the unit. Just as I was about to test the speaker, the control unit caught on fire. Luckily for me, I did not have everything bolted into place and was able to quickly remove it before my vehicle was damaged. Although this siren bundle has a majority of good reviews. I truly hope most of you read this and take this review to heart. For your own safety, and the safety of those you aim to help when using this siren, DO NOT BUY. I do not blame the seller for a faulty unit, but hopefully they will make the refund process hassle-free. You have been warned.