Honeywell Ademco 748 119db Dual-Tone Siren OPEN BOX

We purchased this siren because our current alarm system was just not loud enough. If we were closed in a bedroom you didn't hear it at all, which is pointless! This item was perfectly compatible with our system. Let me tell ya folks, it's LOUD! The only option our alarm Co gave us was a new wireless pad to put in our bedroom that of course needed a different receiver etc etc. For the small price of $500...no way.. This siren solved our problem.. easily wired into our system. We were able to wire it onto our hall wall just outside our control panel, and you barely notice it This siren is so loud let me tell you it will alert your entire neighborhood when it goes off. Love it!

Wicked loud siren!! Just received this for a client outbuilding install. Client wanted to hear siren from inside house and they can definitely hear it 200+ feet away!! Would definitely recommend this unit! uses 12v 1.2 amps of power. Also has a normally closed tamper switch on back of unit. There are five wires coming from back of unit. Common/ ground, red for warble, yellow for steady tone, and two white wires for tamper switch. Tamper switch works in this method: it is a black plastic momentary on switch. When unit is flush mounted against a flat surface, the momentary on switch is pushed in therefore completing the circuit with alarm panel. So take two white tamper wires and hardwire to your alarm panel; one for DC out from panel, and one as the circuit in from siren tamper switch. Program alarm panel as a normally closed door/ window/ whatever zone. IF for any reason someone messes with it outside/ wherever, alarm will sounds if the system is armed. LOVE IT!

Really loud, I ended up using the red and black wires only for my application

I tested the siren I received with a voltage-adjustable bench DC power supply, which told me the current draw at different test voltages. The siren would output both steady and warble tones at all the voltages I tested - between 4V and 14V. The enclosed spec sheet listed the rated voltage at 12 VDC with 1.2 Amp max at that voltage. I do not own a sound meter so did not make measurements of the sound level at different voltages, but the sound at 14V was definitely louder than at 4V. Warble tone drew about 15% ro 20% more current than steady tone at each test voltage (when warble and steady tone wires are both supplied voltages, only the steady tone sounds.) These are my measurements of warble current draw, rounded up to the nearest tenth of an amp:14V: 1.0A; 13V: 0.9A; 12V: 0.9A; 11V: 0.8A; 10V: 0.8A; 9V: 0.7A; 8V: 0.7A; 7V: 0.6A; 6V: 0.5A; 5V: 0.4A; 4V: 0.3AOf course one should use a power supply matching the spec sheets rather than numbers from "some guy on the internet." I just happened to have a spare 12V, 1A wall transformer that does not meet the spec sheet requirement of 1.2A, but my testing shows that it should be fine to use.Note that anyone wanting to use this with Z-Wave needs a Z-Wave controlled power outlet plug, an AC to 12 VDC transformer to plug into the Z-Wave outlet, and then be willing to wire the transformer to the siren - either by soldering a plug to the siren's wires that mates to the transformer's plug, or cutting off the transformer's output plug and connecting the transformer output wires to the siren's power input wires. So some rudimentary electrical skill required (e.g. watch your polarity!)

I was looking for a Loud Smart Siren and this fit the bill. Get this siren, a 12V power adapter, and a smart plug of your choice and you now have a Smart Siren.My next door neighbor was able to hear the siren inside his house. His house is 200-300 yards away (25 yards of which is trees).

Love how loud this siren is. It is compatible with virtually any security system and is easy to install. These last much longer outdoors than outdoor-rated bull horn speakers, from my experience. No need for a speaker driver as this produces a shrill dual tone by simply supplying 12V to it.

Installed this in parallel with an existing 12v bell outside my house. Easy to install and extremely loud. Just what I needed.

Prior to outdoor install, I powered the Siren in the Garage. Painfully Loud.