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Electronics & Phones

FARBIN Horn Siren PA, 7 Tone Police Siren Pa System, 12V 100W Police Alarm | PA mic system, with handheld microphone amplifier

Electronics & Phones3.8· 88 Amazon ratings

Bias-adjusted across 88 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Electronics & Phones.

11.7%
Percentile · Global
8.5%
Percentile · Cohort
Electronics & Phones
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FARBIN Horn Siren PA, 7 Tone Police Siren Pa System, 12V 100W Police Alarm | PA mic system, with handheld microphone amplifier

How the score was built

Amazon ratings
88

used for the Bayesian percentile

Raw star average
3.8 / 5

unadjusted Amazon mean

Bayesian avg
4.06

raw rating shrunk to the category prior

Reviewer-graph z
0.707

bias-corrected vs. each reviewer's baseline (0 qualifying)

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Same category · Electronics & Phones

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