COOSII Over-Ear Headphones Wired Black/Blue — Foldable, Inline Mic & Volume, 40mm Driver

COOSII AC01 are wired over-ear headphones with an inline microphone and volume controls, built for all-day comfort, noise-isolating listening, and wide 3.5mm compatibility.

The COOSII AC01 combines a 40mm DLC dynamic driver with deep memory-style ear cushions and a foldable, lightweight frame to deliver a comfortable listening solution for study, travel, gaming, and calls. Designed as a truly over-ear model, the AC01 emphasizes passive noise isolation rather than active noise cancellation, helping reduce ambient distractions while preserving balanced bass and clear mids. The wired 3.5mm connection and gold-plated plug make the headset broadly compatible with phones, tablets, Chromebooks, and many laptops; an adapter is required for some PC microphone setups.

How do these headphones improve focus during studying or work?

The COOSII AC01 uses a surrounding over-ear fit and enlarged cushioned pads to limit external sound, creating a quieter listening environment. The passive noise isolation combined with a 40mm driver helps you hear details without increasing volume excessively.

• Over-ear earcup size: 3.54 in x 1 in to fully surround the ear
• Deep protein-leather pads with breathable mesh for long sessions
• 360-degree noise-isolation construction reportedly blocks up to 85% of ambient noise
• Balanced bass and treble from the 40mm DLC dynamic driver

What controls and call features are available on the AC01?

The headset includes inline volume buttons and an HD microphone for hands-on call and playback control without reaching for your device. Volume and microphone functions are plug-and-play on most mobile devices using the 3.5mm jack, though PC microphone compatibility may require an adapter.

• Built-in inline volume controls for music and calls
• HD microphone with wind-noise suppression for clearer voice pickup
• 3.5mm gold-plated connector for broad device compatibility
• Note: PC mic/volume features may need a separate adapter

Are the AC01 headphones comfortable and portable for everyday use?

Yes—COOSII designed the AC01 with enlarged ear pads and a lightweight TPU headband featuring a centre relief zone for ergonomic fit. The foldable hinge and compact profile make these headphones simple to store in a backpack or carry case for commuting and travel.

• Enlarged ear pads are about one-third bigger than typical models
• Breathable mesh and soft protein leather minimize heat buildup
• Adjustable headband with lightweight TPU construction for comfort
• Foldable design for easy packing and portability

Which devices work with the wired COOSII AC01?

The AC01 connects via a standard 3.5mm audio jack and is compatible with phones, tablets, Chromebooks, and many laptops that support a combined headset jack. Because the headset uses a single 3.5mm plug, certain desktop PCs or older computers may need a TRRS-to-dual-TRS adapter to use the microphone.

• Compatible: phones, Fire tablets, Chromebooks, most laptops with 3.5mm jack
• Gold-plated plug for improved contact and signal
• Microphone and volume controls work on mobile devices with TRRS jacks
• Adapter required for some PC microphone setups

Who is this for? The COOSII AC01 is aimed at students, remote workers, and casual gamers who want a comfortable over-ear wired headset that prioritizes passive noise isolation and straightforward controls. If you need a dependable plug-and-play option for lectures, online classes, library study sessions, commute listening, or multiplayer voice chat—and you prefer a wired connection for wide device compatibility—these headphones are a practical, budget-friendly choice. Check your device’s 3.5mm jack compatibility if you rely on PC mic functionality.