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DREO

DREO 4L Humidifiers for Bedroom, 36H Runtime, 28 dB Quiet, HM311

$39.99

Price went up recentlyRose from $35.94 to $39.99 on October 8.

at Amazon

#29 by sales rank of the 187 in Air & climate

Above the middle of our record.

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Watch this price

$39.99 is above the middle of our record.

The middle price across the 23 days we have watched it, counting the days a limited-time deal was running, was $35.94. That is $4.05 less than today. It reached $35.94 at least once in that time, and the high was $39.99.

Today's price is $4.05 above its usual $35.94.

This describes the prices we recorded. It is not a forecast of where this one goes next.

Price at AmazonVerified

Price history

One line: the best price any tracked retailer charged, per day.

Prime Big Deal Days 2026median $35.94low $35.94SepOctnow $39.99

Lightning or limited-time deal

23 days on record · 3 price changes

sales rank — the line rises as it sells moreShaded stretches are sales, from our calendar.

Use this chart elsewhere:The chart redraws itself as we record new prices.
Prices we recorded ourselves. Usual is the price on the typical day, with limited-time deals left out unless they ran on most of the days we recorded; Average is the mean of every recorded day, deals included, so a gap between the two columns is a record holding an outlier.
PriceNowLowestHighestUsualAverageDays recorded
New$39.99$35.94 on Sep 23$39.99 on Sep 20$35.94$37.0023

Sales events

Next on the calendar: Black Friday, November 27. We keep checking this price through it and report here what it did.

What our record shows

  • $4.05 more than the $35.94 it cost on September 23 — this price went up, not down.

Computed from our own checks at Amazon as of October 10. No line here uses a price a retailer told us about.

Where to buy

Held for
2d
Their 23-day low
$35.94
Checked
11h ago

Prices checked at least every 12 hours. “Held for” is how long that retailer has been charging this price. A hidden price is one we cannot re-confirm recently enough to publish.

We earn a commission on purchases. It never affects our rankings.

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Other versions of this model

All 3 priced versions cost $39.99 today, so pick on looks.

Amazon’s own price for each, read through their API. Verified

What it is

6 attributes, in the retailer’s own words. We record the prices; these we only pass on.

Size
4L
Color
White
Weight
3.12 pounds
Dimensions
11.02 × 10.16 × 5.51 inches
Model
DR-HHM001
Released
April 2024

Cheaper in Air & climate, and what changes

Things we track on the same shelf for at least 10% less than $39.99, with the attributes the retailers describe differently. Their words, not our judgement — we record prices, we do not test products.

Every change we recorded at Amazon

Every row is a price we saw change. We write one only when a price actually moves, so a gap here means the price held.

WhenPriceChange
2d ago$39.99+$4.05
17d ago$35.94−$4.05
20d ago$39.99+$4.04
22d ago$35.95first seen
See all Air & climate prices

$39.99

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