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50

3 plug

Worth a look

Shows searches that convert (10.2% search→purchase), but a small market ($36K/yr) keeps it on the watch list.

Market size 9Growth 46Conversion 88Competition 75Returns 83Price range 37Avg price 29Brand share 75Review moat 23Quality gap 18

Conversion

Great10.2%

search→purchase rate — share of searches ending in a sale

Returns

Great1.6%

return rate — above 5% kills the launch gate

Competition

Good40%

top-5 click share — leaders hold, buyers still browse

Brand share

Great60%

top-5 brand share — no brand owns this niche

Growth

Okay+17.1%

90-day search growth — must beat 0% to launch

Price range

Okay$4.63–$21.04

cheapest to priciest tracked listing — scored on the share inside $15–$100

Avg price

Okay$9.52

avg listing price — sweet spot $15–$100

Review moat

Bad8,091.32

avg incumbent reviews — the moat a new listing must climb

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Market size

Bad$36K

$36K/yr · 37K searches

According to Flapen's Amazon United States niche tracking, 3 plug is a $36K/yr Amazon United States market (37K searches/yr). The top 5 brands hold 60% of demand. Demand peaks in Dec. Verdict: Worth a look — 50/100.

Data updated Jul 27, 2026 · scored weekly · How we score niches

3 plug market data

Units sold / yr
3K–4K
avg 0–100/product
Revenue / yr
$29K–$38K
units × avg price
Conversion rate
10.2%
Avg BSR
#50
Page quality
0%
Prime
100%
Sponsored
87%
Out of stock
1.6%
Avg brand age
47 months
Avg seller age
184 days

Competition & brand share

The top 5 products take 40% of clicks — established leaders, but buyers still shop beyond them.

Brands

25 falling

Sellers

52

Top-5 brand share

60%

Top 20: 97%

Top-5 click share

40%

Top 20: 87%

Open market

34%

  • TROND22%
  • Philips11%
  • Cable Matters9%
  • ElectraTrac9%
  • Miady8%
  • GE6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +17.1% search growth over the last 90 days.
2K2KHoliday '24Spike '25Prime Day '25Holiday '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Dec · busiest ÷ quietest = 2.2×

Top 3 plug search terms

  • 3 prong outlet extender11K/yr
  • single outlet extender10K/yr
  • 3 prong extender6K/yr
  • 3 prong plug extender5K/yr
  • plug extender 3 prong5K/yr
All search terms

Top 3 plug products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%3%$1K6%$2K9%$3K12%$4K1001K10K100K1.0M Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

What buyers say about 3 plug

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall14%

“The build quality feels solid”

Socket/Port/Plug13%

“Love all the USB ports”

Advertised Vs Actual Product12%

“Exactly what we needed”

Charging10%

“Fast charge”

Ease Of Use8%

“Comes in handy”

Value For Money7%

“Money well spent”

Size-Overall5%

“They fit snugly”

Assembly/Installation4%

“Installed quickly and easy”

Design-Overall3%

“Compact design”

Connectivity-Overall2%

“Good connection”

What buyers complain about

Socket/Port/Plug15%

“The usb ports don't work”

Durability9%

“Poor durability”

Charging9%

“Stopped Charging”

Size-Overall7%

“too small”

Functionality-Overall7%

“Not working properly”

Quality-Overall5%

“Disgraceful garbage”

Ease Of Use3%

“Hard to Use”

Weight Heavy3%

“theyre pretty bulky”

Flammable2%

“CAUGHT ON FIRE”

Strength2%

“Flimsy”

Top return reasons

Size-Overall33%
Charging14%
Compatibility-Overall10%
Socket/Port/Plug10%
Functionality-Overall7%
Advertised Vs Actual Product6%
Value For Money3%
Defective Material/Parts3%
Connectivity-Overall2%
Add-Ons/Attachments2%

Common questions

Is 3 plug profitable to sell on Amazon United States?
The niche generates $36K/yr across 38 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +17.1%. Flapen's verdict: Worth a look (50/100).
How competitive is the 3 plug niche?
25 brands and 52 sellers compete. The top 5 products take 40% of clicks and top 5 brands hold 60% of demand.
What do buyers complain about in 3 plug?
Top complaints mined from reviews: Socket/Port/Plug, Durability, Charging. The return rate is 1.6%.
When does demand for 3 plug peak?
Demand peaks in Dec; the busiest month runs 2.2× the quietest.
What does it cost to enter the 3 plug niche?
Listings span $4.63–$21.04; the average listing price is $9.52 (sweet spot $15–$100). The average incumbent carries 8,091 reviews — the moat a new listing must climb.