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Black and blue over-ear headphones with padded cups, adjustable headband, and inline mic control

COOSII AC01 Over-Ear Wired Headphones Black Blue 40mm 3.5mm

SKU CH-5C02-KR94Z

Wired over-ear headphones with 40 mm drivers, 3.5 mm jack, inline volume control and foldable design for portable use

  • Driver size40 mm
  • Frequency range5 Hz-20 kHz
  • Headphone styleOver Ear
  • Impedance32 ohms
  • Signal-to-noise ratio117 decibels
  • Audio sensitivity117 decibels
  • Blocks up to 85% ambient noise with 360° over-ear isolation
  • 40 mm DLC dynamic driver delivers balanced bass, treble and clear mid-range
  • Enlarged protein-leather ear pads and adjustable TPU headband for all-day comfort
  • Inline volume and call controls on 3.5 mm plug
  • Lightweight foldable design for easy travel and storage

Over-Ear Headphones with 40mm Drivers

The COOSII AC01 is a wired over-ear headset built around 40mm dynamic drivers and a 3.5mm plug. It delivers a 5Hz-20KHz frequency response, 32 ohm impedance and 117 dB sensitivity for balanced stereo sound. Passive noise isolation blocks up to 85% of ambient noise, while the inline microphone covers 20Hz-20KHz with the same 117 dB signal-to-noise ratio.

Students, Commuters and Office Workers

Buyers who want a lightweight, foldable headset with simple volume and call controls will appreciate the protein leatherette pads and adjustable TPU headband sized for ages 12 and up. The 3.5mm jack works with phones, tablets, laptops and PCs without extra software. Users who need wireless freedom, active noise cancellation or a USB digital connection should look at a different design.

Plug-and-Play Setup with Inline Controls

Installation is instant: insert the 3.5mm connector into any compatible audio port and use the push-button remote for volume, track skipping and call handling. The tangle-free cable reduces snagging, and the foldable hinges make storage simple. The only common issue is ensuring the single 3.5mm plug matches a combined headset jack or using a splitter when separate mic and headphone ports are required.

How it compares

Measured against everything we stock in Earbuds & Over-Ear Headphones, at today’s prices. Recalculated every night.

Price $35.99
Pricier than about 61% of the 7,078 comparable items (median $25.99).

Specifications

Product
Brand nameCOOSII
Product line1
Model nameAC01, sample sku 22370
Part numberSample sku 22370
Product typeOver the Ear
Product colorBlack/Blue
Audio & video
Driver size40 mm
Frequency range5 Hz-20 kHz
Headphone styleOver Ear
Impedance32 ohms
Signal-to-noise ratio117 decibels
Audio sensitivity117 decibels
Wearing styleOver ear
Noise cancellationSound isolation
Mic impedance~3K ohm
Mic frequency response20 Hz-20 kHz
Mic signal-to-noise ratio117 decibels
Mic sensitivity117 decibels
Ports & slots
Connection3.5 mm

Questions about this item

What device port does the 3.5 mm plug on the COOSII AC01 need?

The headphones use a standard 3.5 mm audio jack, so any device with a matching 3.5 mm headphone socket — phone, tablet, laptop or PC — will work without an adapter.

Can the 32 ohm impedance and 117 dB sensitivity drive adequately from an older laptop headphone output?

Yes, the 32 ohm impedance and 117 dB sensitivity are designed for efficient performance from typical laptop and mobile headphone outputs, delivering full volume without a separate amplifier.

How can I confirm the inline microphone is functioning after plugging in the headset?

Make a test call or open a voice recorder; the inline push-button control should answer calls and the microphone frequency response of 20 Hz–20 kHz will capture speech clearly if the connection is solid.

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