Loud outside, visible from the street, and awkward to reach · review
The only siren here you can aim and the only one with two sounds — and the only one whose own numbers rule out its headline claim.
The conclusion Buy it for the two things nothing else here has: an angle you can aim, which matters once it is mounted high under an eave, and two selectable sounds chosen by which wire pair you connect. The decibel claim should be ignored — 150 dB is a thousand times the power of the 120 dB horn on this shelf, from a stated 300 mA at 12 V that is actually less power than its rivals. Its own page also gives 30 W against 3.6, and millimeters for centimeters.
No tamper switch. No backup battery. No strobe. No IP rating.
And the page disproves itself.
Decibels are logarithmic. Every ten is ten times the acoustic power, so 150 is a thousand times 120.
The other sirens on this shelf claim 110, 118 and 120 dB at stated fifteen and twenty watts.
FTGear’s own data sheet gives 300 mA at 12 V — three point six watts. Less electrical power than either of them, and a thousand times the sound.
A hundred and fifty decibels at one meter is also about twenty above the threshold of pain, and causes immediate permanent hearing damage.
Read it as a 110 to 120 dB horn.
Three consecutive lines, two of which disagree.
Rated Power: DC12V — which is a voltage. Rated Current: 300mA. Rated Power: 30W.
Twelve volts at 300 mA is 3.6 W. Thirty watts at 12 V needs 2.5 A, eight times the stated current.
The current is the figure installation needs, and 300 mA sits comfortably within almost any panel output.
Another siren on this shelf has the same contradiction, at a factor of four.
Pick one.
“Size: 19.511.922.5mm (0.89 in)” with a net weight of 1.98 pounds.
Two centimeters by one by two cannot weigh two pounds. These are centimeters labeled millimeters — roughly 195 × 119 × 225 mm (7.68 × 4.69 × 8.86 in), which is a horn-sized horn.
Neither of which depends on the decibel claim.
An angle you can aim. Loosen the nut and tilt it. This shelf’s buying tip says to mount an outdoor siren high on a visible gable — and a horn mounted high and pointed at the soffit is a loud roof. Aim is the third variable after height and visibility, and this is the only siren here that has it.
Two sounds, on a third wire. Red and white for one, yellow and white for the other. Two sirens on one system can then sound differently, so you know which one triggered.
Also: the coil is named as pure nickel alloy wire. On an outdoor horn the coil is what corrodes first, and nobody else on this shelf says what theirs is made of.
On sale at around $26 on the American Amazon store at the time of checking.
Prices and availability are what Keepa reported on the date this page was updated; both move.
Prices quoted in this text were read on October 8, 2026. The live price is at the top of the page.
| Sound level | 150 dB claimed. Read it against the rest of this shelf: a 20 W horn here claims 118 dB and a 15 W horn claims 120 dB, and thirty decibels is one THOUSAND times the acoustic power. FTGear's own data sheet gives 300 mA at 12 V, which is 3.6 W — less electrical power than either of them. The figure cannot be right, and no measuring distance is given |
|---|---|
| Power | The page gives "Rated Power: DC12V", "Rated Current: 300mA" and "Rated Power: 30W" in three consecutive lines. Twelve volts at 300 mA is 3.6 W. Thirty watts at 12 V would draw 2.5 amps, eight times the stated current. The two figures cannot both be true |
| Tones | TWO selectable sounds, chosen by wiring: red and white for one, yellow and white for the other — stated. It is the only siren on this shelf with a choice of sound, and the mechanism is the simplest possible: a third wire |
| Mounting | An adjustable angle: loosen the nut and the horn tilts vertically within a small range to optimize the direction. It is the only aimable siren on this shelf, and under an eave that is worth real decibels at ground level — this shelf's buying tip is about height and visibility, and aim is the third variable |
| Material | A flame-retardant ABS shell with a coil of 100% pure nickel alloy wire, stated for oxidation resistance, conductivity and corrosion resistance. Naming the coil material is unusual, and on an outdoor horn the coil is what corrodes first |
| Dimensions | The data sheet reads "Size: 19.5*11.9*22.5mm (0.89 in)" for an object whose stated net weight is 1.98 lb. Two centimeters by one by two cannot weigh two pounds: these are centimeters labeled millimeters, giving roughly 195 × 119 × 225 mm (7.68 × 4.69 × 8.86 in) |
| Tamper | None. This shelf's introduction calls tamper protection what stops a siren being silenced first, and no siren on this shelf has one |
| Backup battery | None, and no strobe — despite being the only one of the four sold explicitly as an outdoor siren |
| Stated for | Home security and building intercoms, with wired alarm hosts named. The intercom use is specific and plausible: a 12 V horn on an entry panel |
| Amazon reference | B0CR47KR53 |
| EAN | 0717225472634 |
No, and the arithmetic is on its own page. Decibels are logarithmic: every ten is a tenfold increase in acoustic power, so 150 dB is a thousand times the power of 120 dB. The other sirens on this shelf claim 110, 118 and 120 dB at stated 15 and 20 watts, and FTGear's own data sheet gives 300 mA at 12 V — 3.6 watts, less than either. A hundred and fifty decibels at one meter is also roughly twenty above the threshold of pain and would cause immediate permanent hearing damage. Treat it as a horn in the 110 to 120 dB class and buy it for the other features.
Three point six, on the figures given. The data sheet lists rated power twice — once as DC12V, which is a voltage rather than a power, and once as 30 W — and lists rated current as 300 mA. Twelve volts at 300 mA is 3.6 W; 30 W at 12 V would need 2.5 A. The current is the figure that matters for installation, because it decides whether a panel's siren output can carry it, and 300 mA is comfortably within almost any. Another siren on this shelf has the same contradiction at a factor of four.
Two things the rest of this shelf does not offer. The adjustable angle means a horn mounted high under an eave can be aimed down rather than throwing its sound at the soffit — and this shelf's buying tip says to mount outdoor sirens high on a visible gable, which makes aim the difference between a loud roof and a loud street. The two selectable sounds, chosen by which pair of wires you connect, let two sirens on one system sound differently so you can tell which triggered. Neither claim depends on the decibel figure.
Between security devices of the same category and nearby price. Shown: what they all state. A half-filled column says nothing.
| Model | Price | Sound level | Power | Tamper | Backup battery |
|---|---|---|---|---|---|
| FTGear W3Y-DYV-WWO634 outdoor siren speaker, 12 V, two selectable sounds | $26 | 150 dB claimed. Read it against the rest of this shelf: a 20 W horn here claims 118 dB and a 15 W horn claims 120 dB, and thirty decibels is one THOUSAND times the acoustic power. FTGear's own data sheet gives 300 mA at 12 V, which is 3.6 W — less electrical power than either of them. The figure cannot be right, and no measuring distance is given | The page gives "Rated Power: DC12V", "Rated Current: 300mA" and "Rated Power: 30W" in three consecutive lines. Twelve volts at 300 mA is 3.6 W. Thirty watts at 12 V would draw 2.5 amps, eight times the stated current. The two figures cannot both be true | None. This shelf's introduction calls tamper protection what stops a siren being silenced first, and no siren on this shelf has one | None, and no strobe — despite being the only one of the four sold explicitly as an outdoor siren |
| QWORK WD8893 electric siren horn, 12 V, 110 dB, 2-pack | $15 | 110 dB, dual tone — stated. It is the lowest figure on this shelf and the only dual-tone horn here: two alternating tones carry further through a house than one steady note, because a changing pitch is harder to ignore and harder to mistake for a vehicle | 15 W rated at DC 6 to 12 V, stated, with low power consumption claimed. No current figure is given, so the 15 W cannot be checked against it — two sirens on this shelf publish a current that contradicts their own wattage | None. This shelf's introduction calls tamper protection what stops a siren being silenced first; no siren on this shelf has one | None, and no strobe. Nothing to pair: these are wired horns for an existing panel |
| HQRP Electronic alarm siren, 20 W DC 12 V, 118 dB, with bracket | $12 | 118 dB, stated. No measuring distance appears, and this shelf's introduction says the stated level is quoted at one meter and falls quickly with distance. It is also quoted without a voltage, where one siren on this shelf ties its figure to 12 V and warns that a lower supply gives fewer decibels | 20 W at DC 12 V, stated — the highest wattage on this shelf, and the only one no other figure on its own page contradicts. Two sirens here publish a current that disagrees with their stated watts; HQRP publishes no current, so the 20 W stands uncontested and unverified | None. This shelf's introduction calls tamper protection what stops a siren being silenced first, and no siren on this shelf has it | None. No strobe either, and nothing to pair: this is a wired horn for an existing system |
| Tokatuker BT626 wired alarm siren horn, 15 W, DC 6–13 V | $12 | 120 dB at 12 V DC — stated, with the qualification "low voltage would be low Db". It is the ONLY listing on this shelf to tie its decibel figure to a supply voltage and to say that the figure falls when the voltage does, which matters because all four sirens here accept 6 V upwards. No measuring distance is given, and this shelf's introduction says the stated level is quoted at one meter and falls quickly with distance | 15 W rated, stated — against the 3.84 W its own current and voltage figures give. Both numbers are on the same page | NONE. This shelf's introduction calls tamper protection — a switch that fires the alarm when the cover is opened or the unit is prised off the wall — what stops a siren being silenced first. No siren on this shelf has one | None, and no strobe. All four sirens on this shelf are bare horns fed from the panel |
Details checked on October 8, 2026.
An outdoor horn that has to be aimed down a drive, bought on its features rather than its decibel claim
Specifications: the manufacturer sheet for home security products and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
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