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Office & Industrial

DZS Elec AC 220V 4000W Voltage Regulator Dimmer Motor Speed Controller 10V-220V Large Power AC SCR Voltage Regulation Dimming Tempering Power Monitor Regulator Module

Office & Industrial3.5· 130 Amazon ratings

Bias-adjusted across 130 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Office & Industrial.

5.7%
Percentile · Global
3.8%
Percentile · Cohort
Office & Industrial
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DZS Elec AC 220V 4000W Voltage Regulator Dimmer Motor Speed Controller 10V-220V Large Power AC SCR Voltage Regulation Dimming Tempering Power Monitor Regulator Module

How the score was built

Amazon ratings
130

used for the Bayesian percentile

Raw star average
3.5 / 5

unadjusted Amazon mean

Bayesian avg
3.84

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 · Office & Industrial

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