Acer HK03 Kids
🎚️ On-ear In stock

Acer

Acer HK03 Kids

Nine of Amazon's fourteen best-selling on-ear headphones are children's school headphones. This is the highest placed.

4.6(673)
$13.99price as of 2026-09-08
View on Amazon

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Battery life WITH ANC
Codecs
Weight
147
Active noise cancelling
No

Our scoring

Six axes, the same rule for every model. This is our judgment, not the manufacturer's.

Editor's score, 0 to 10 · how we work it out
Editor's score
Battery lifeNot published by the manufacturer
Cancelling0/10
Sound4/10
Comfort6/10
Calls4/10
Value8/10

The review

This one is in the comparison to make a point that the ranking makes on its own. Of the fourteen best-selling on-ear headphones on Amazon, nine are children's school headphones. Positions 4, 5, 6, 7, 9, 10, 12, 13 and 14. The category is not really an adult category any more; it is a school-supplies category with three adult models in it.

So here is the highest placed of them, at #4, for $13.99. And it does something none of the expensive models manage: it tells you how loud it can go. 85 dB, switchable to 94. The $359 Bose does not publish that figure. Neither does the $298 Sony. A field that matters for hearing exists on the listing of a toddler's headphone and nowhere else on this site.

The rest of the page is the usual mess. Six different fields argue about whether it sits on the ear or over it, and one of them assigns an antenna location to a device with a cable.

If you are buying for a child, the volume limit and the CPSIA materials claim are the two things worth paying for, and both are here.

The good

  • The only model on this site that publishes a maximum volume: 85 dB, or 94
  • $13.99
  • 4.6 out of 5, the joint-highest rating here
  • CPSIA-compliant materials, a standard you can hold them to
  • 40 mm drivers and a folding frame
  • No battery, so nothing to charge before school

The not so good

  • It is a children's headphone: the fit is built for a small head
  • Only 673 ratings — a fraction of the sample behind the other models here
  • Six fields on the listing disagree about on-ear versus over-ear
  • Wired only, and volume control is on the cable
  • No frequency response or sensitivity published
$13.99price as of 2026-09-08
View on Amazon

Full spec sheet

Anything marked «—» is a figure the manufacturer doesn't publish. We don't fill those in by eye.

General

TypeOn-ear
Form factorFoldable wired headphone for children, 3.5 mm, volume limiter

Sound and cancelling

Active noise cancellingNo
Cancelling typeNone. «Passive Noise Cancellation» in the table is the padding
Transparency modeNo
Driver size40
Driver typeDynamic
EQ in the appNo

Battery and charging

Battery life, ANC off
Battery life WITH ANC
Total with the case
Fast charge
Wireless chargingNo
Replaceable batteryNo

Connectivity and codecs

Bluetooth version
Codecs
Two devices at onceNo
Latency
2.4 GHz dongle includedNo
Microphones1

Comfort, durability and warranty

Weight147
Water resistance (IP)
FoldsYes
Warranty1

Other specs

The only maximum volume published on this site85 dB, switchable to 94. Not one of the adult models in this comparison — not the $359 Bose, not the $298 Sony — says how loud it can go. The children's headphone does, because US rules for children's audio ask it to.
On-ear or over-ear: six fields, three answers«Form Factor: Over Ear». «Earpiece Shape: Over-ear». «Ear Placement: On Ear». «Headphones Ear Placement: On Ear». The title says over-ear. Amazon ranks it #4 in On-Ear Headphones, so that is where we file it.
Antenna Location: Entertainment, Studying, TravelIt has a cable.
673 ratings, and #4 in its categoryThe ranking is built from recent sales, not from how many people have reviewed something. That is how a headphone with 673 ratings outranks one with 20,214.
Theme«Fantasy».
CPSIA materialsThe seller cites the US children's product safety standard for the plastics and padding. That is a claim you can hold them to.

What buyers say

A summary of the reviews published on Amazon.com as of 2026-09-08.

4.6 out of 5 4.6 673 ratings

4.6 out of 5 from 673 ratings, a young listing climbing fast on recent sales. Parents praise the volume limit and the padding; the complaints are about the headband adjuster and about the microphone being picked up faintly on school video calls.

Reviews and prices change. Check before you decide.

See reviews and price on Amazon

Compare it with these

Add two or more models to the comparison tool and you'll see their tables and charts side by side.

ARTIX CL750
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ARTIX CL750

The last adult model in Amazon's on-ear ranking before it turns into children's school headphones.

Battery life WITH ANC
Codecs
Weight
260
$35.00price as of 2026-09-08
4.3(20,214)
Sony WH-CH520
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Fifty hours and 147 grams — and a spec table that gets the driver and the charge time wrong.

Battery life WITH ANC
Codecs
Weight
147
$68.00price as of 2026-09-08
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