30 Watt Siren Dual Tone Indoor/Outdoor Siren SD-30W 6-12VDC 1.1Ah 120db 8 X 5.5 X 9 Inch (1 Pack, White)

I just got mine today, and had it up and running in less than 10 minutes. I also bought the "BINZET DC12V 2.5A 30 Watt LED Power Supply Driver Transformer AC 120V-130V to DC 12V 2.5A Output Voltage Convertor LED Strip Low Voltage Powered LED Light Regulator" that they recommended, and both are great together. Simply connect and tape the White wire on the siren to the negative wire on the power supply. Then, connect the Red wire on the siren to the positive wire on the power supply if you want it to sound like a police siren. If you want just a steady tone, connect the yellow wire on the siren to the positive wire on the power supply. (One wire will not be connected to anything).You will most likely also want to buy a smart plug to control it with your phone wirelessly, I got the "Kasa Smart WiFi Plug by TP-Link – Smart Plug, No Hub Required", and it is super fast to setup, and you can control multiple devices from the same app... Very cool. I can monitor my home through my wifi camera, and if I get an alert I can just take a look, and blast the siren to scare someone away BEFORE they break in. Very loud, and very cool, easy and affordable to setup and use... HIGHLY RECOMMENDED !!! If you put it in your garage, nobody can mess with it and it is still loud enough to wake the neighbors in your typical neighborhood if something happens. No thief would stick around with this siren blasting, I guarantee it ! Make sure you wear earplugs when you test it, as it is SUPER LOUD !!! I hope you enjoy yours as much as I do... Cool Factor 10/10 !

great for that obnoxiously loud neighbor; best when used with a smart home (on button press starts the siren for the length of time that you desire; convenience from your pocket)

Very loud. Works as expected

This product is loud. I am using it as a pa system in my car. You have to take it apart and rewire it then you can use it for that. I wired it up and she is loud. No amp hooked up at all. She is loud. Good price too. But the package came with no directing and was kinda open. But how cares it is loud.

I had a power cord I snagged with permission from xfinity's store when paying a bill, frayed, the inside of round wire is hit outside is neutral, wired it up to a tam tam smart switch, and testing it a few times, even behind storm door, ears were left ringing. I wired it up as well to SECO-LARM SL-126Q siren light, hung it under a carport as a precursor to having to physically confront trespassers, or annoying/dangerous people bothering us/our property out back: it's aimed right at the truck door. After my experiences with this when/if I decide to trigger it from broken contact on door sensors I have installed, or just seeing on wyze cam someone back there, I promise they will not stay there for long... you can;t think when this thing is going off, only thing you can gather is get somewhere it won't be heard, like far away... it hurts ears. Only thing I wish I'd have done is wire up two which only would have been a dozen bucks more. But one is so loud I couldn't imagine right now having such a sound in stereo, LOL. Great price for such a loud option.

I read other review, buying this and the DC12V 2.5A 30 Watt LED Power Supply Driver Transformer AC 120V-130V to DC 12V 2.5A Output Voltage Convertor LED Strip Low Voltage Powered LED Light Regulator. They both work WONDER. The siren is LOUD and IMPRESSIVE.

Pretty easy review - I purchased this to work with my existing remote camera system. I didn't have a motion detection alarm option (just remote notification) so I wanted to setup something that I could remotely turn on and off. I have installed this horn outside of my home, next to a motion detection light so that it's harder to see. I get notifications on my phone if the camera detects movement. I can then decide if it's something non-threatening (like a animal or wind) or if it's a threat.I use this camera inside my garage (but I'd feel completely safe using one of their outdoor cameras):Arlo Q by NETGEAR - 1080p HD Security Camera | 2-way audio | Indoor only | No base station required (VMC3040), Works with AlexaThat sends me a notification on my phone - I decide threat or not - if so, I remotely turn my remotely controlled (IP) power switch on:This is the switch I'm using:Smart Plug Wi-Fi Mini Socket Outlet Compatible with Alexa Wireless Control Your Devices from Anywhere, ETL Certificated Timing Function For Smart Phone Voice Control for Home Appliances WhiteI have this AC/DC adapter plugged into the Wi-Fi socket:OMNIHIL Replacement (8 Feet Extra Long) 12 Volt 3 Amp Power Adapter, AC to DC, 5.5mm X 3.0mm w/Center Pin Plug, Regulated 12v 3a Power Supply Wall PlugThere's a small hole drilled in my garage (you could pass it through a window or similar also. The Siren is easy to wire, just look at the wiring info on the back of the horn (the siren doesn't come with any documentation - it's on the horn.. just look)The WHITE wire is your common or ground (black).The Yellow wire is a solid tone (connect this to the red wire on your DC source).The Red wire is the siren (connect this to the red wire on your DC source).You should only have 2 wires connected! WHITE and either Yellow OR Red (I recommend red - it's a police siren).Make sure you tape off all exposed wires so they don't touch each other and that wire connections are well made.If you're having problems getting this to work - post a comment and I'll try to help.