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Black mono USB headset with over-ear leatherette cushion and adjustable headband

Cyber Acoustics AC-840 Mono USB Headset

SKU CH-FYJD-TZ0W9

Mono USB headset with active noise-cancelling microphone, inline volume and mute controls, adjustable headband and leatherette ear cushion

  • Wireless technologyWireless
  • Headphone frequency range20000 Hz
  • Headphone impedance32 ohm
  • Noise cancellationActive noise cancellation
  • ConnectionUSB
  • Wearing styleOver Ear
  • Noise-cancelling microphone captures clear speech in noisy spaces
  • In-line volume and mute controls give instant audio adjustment
  • USB plug-and-play works with Windows, Mac and Chromebooks
  • Adjustable headband and leatherette ear pad ensure comfortable all-day wear
  • Lightweight 3.2-ounce design reduces fatigue during long sessions

Single-ear USB headset for work and school

The Cyber Acoustics AC-840 is a mono headset that connects through a standard USB port and is built for offices, classrooms and call-centre desks where clear speech matters more than stereo sound. Its lightweight 3.2-ounce frame and adjustable headband suit long shifts.

Unidirectional noise-cancelling microphone

The boom-mounted mic uses active noise cancellation to reject background chatter and capture only the wearer's voice, so conference calls and voice recordings stay intelligible even in open-plan spaces. In-line volume and mute controls let users adjust levels without leaving the call.

Driver-free USB setup with ambidextrous boom

Plug the headset into any Windows, macOS or Chrome OS device and it is recognised immediately with no extra software. The flexible boom arm swings to either side for left- or right-ear wear, while the leatherette ear pad wipes clean between users. Buyers who need stereo audio or wireless freedom should look elsewhere.

How it compares

Measured against everything we stock in Wired & Wireless Headsets, at today’s prices. Recalculated every night.

Price $22.99
Cheaper than about 84% of the 1,586 comparable items (median $60.99).

Specifications

Product
Brand nameCyber Acoustics
Product line840
Model nameAC-840
Part numberAC-840
Product colorBlack
Audio & video
Headphone frequency range20000 Hz
Headphone impedance32 ohm
Noise cancellationActive noise cancellation
Wearing styleOver Ear
Connectivity
Wireless technologyWireless
Ports & slots
ConnectionUSB
Size & build
Product weight3.2 oz

Questions about this item

What does the 20000 hertz frequency response mean for daily calls?

The 20000 hertz upper limit covers the full range of human speech, so voices sound clear and natural during lessons or meetings.

How does the USB connection affect compatibility and audio quality?

The USB plug provides digital audio and power in one cable, working natively with Windows, Mac and Chromebooks without extra drivers.

Will the adjustable headband and 3.2 ounce weight fit comfortably for long sessions?

The lightweight 3.2 ounce build and sliding headband let you dial in a secure fit that stays comfortable through extended classes or shifts.

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