Acer A640 4K USB Webcam

The Acer A640 is a 4K USB webcam listed with CMOS imaging, autofocus and a physical privacy shutter. Its claimed noise-cancelling microphone and low-light correction suit calls and streaming, while the listing's technical details include inconsistent camera specifications that buyers should review before relying on particular optics or zoom figures.

At a glance

The listing claims 4K video capture and a CMOS sensor, with PDAF autofocus described in the product title and feature text.
A claimed physical privacy shutter can cover the lens when the camera is not in use.
The listing describes AI noise cancellation for the microphone and automatic low-light correction.
A USB-A to USB-C adapter is claimed in the feature text, alongside plug-and-play setup.

Price

£30.70Save 39%

Reference price: ~~£49.99~~

Price checked: 13 Nov 2026

View offer

Often bought together

Logitech MK270 Wireless Keyboard and Mouse Combo for Windows | 2.4 GHz Wireless, Compact Mouse, 8 Multimedia Keys, 2-Year Battery, for PC/Laptop, QWERTY UK English - Black

£18.99

Logitech H390 Wired Headset for PC/Laptop, Black | Laptop headset with microphone, USB-A plug-and-play, in-line controls, stereo sound, works with Chromebook

£21.69

Pros and cons

Pros

Autofocus, a physical shutter and a claimed microphone are useful for video calls without a separate camera or microphone setup.
USB connectivity and the claimed USB-A to USB-C adapter offer connection options for different computer ports.
Customer feedback mentions clear-looking images and straightforward setup.

Technical specifications

22 specifications

Identity
Brand	Acer
Model	A640

Display and video
Screen size	2 Inches
Video capture resolution	4K
Effective still resolution	2160 MP
Effective video resolution	8.29 MP
Maximum display resolution	UHD MP

Camera optics
Sensor technology	CMOS
Focus type	Auto Focus
Maximum focal length	26 Centimeters
Minimum focal length	10 Centimeters
Maximum aperture	2.8 Millimetres
Lens type	Zoom
Optical zoom	1 x
Digital zoom	4 x
Zoom type	Digital
Image stabilisation	No

Connectivity and controls
Connection listed	USB
Compatible device	Personal Computer
Colour	Black
Listed feature	Low Light

Dimensions and installation
Weight listed	0.29 Pounds

What to know before buying

Listing details to confirm

Listing details are inconsistent or unconfirmed: 4K capture is claimed, while maximum display resolution is given as "UHD MP" and still resolution as "2160 MP". It also lists a 1 x optical zoom, 4 x digital zoom and Zoom lens, but gives focal lengths in centimetres and aperture in millimetres. Confirm the relevant video mode and optical details if they matter to your setup.

Who is it for?

A good fit for

PC users looking for a USB webcam for calls, meetings or streaming.
Buyers who want autofocus and a physical lens shutter.
Users interested in the claimed low-light correction and noise-cancelling microphone.

Less suited to

Buyers who need independently established video modes, frame rates or precise lens specifications before purchase.
Those seeking a wireless webcam, since the connection is listed as USB.

Acer A640 4K USB Webcam · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 456 ratings

5 stars83%83%
4 stars7%7%
3 stars3%3%
2 stars2%2%
1 star5%5%

Customer feedback highlights perceived image clarity, ease of setup and autofocus, with some positive comments about performance and value. Those impressions are relevant to video calls and streaming, but they do not resolve the listing's inconsistent resolution and lens details. The overall rating distribution is mostly five-star, with a smaller spread of lower ratings, so experiences are not uniformly positive.

Positive themes

Customer feedback describes clear picture quality and easy setup.
The customer summary includes positive comments about focus and video-stream performance.

Frequently asked questions

Does the Acer A640 claim 4K video?

Yes. Video capture resolution is listed as 4K, but the display and still-resolution entries use inconsistent values and units. Confirm the actual mode if precise output is important.

Does it include a privacy shutter?

The feature text claims a physical shutter that slides closed over the lens.

How does it connect to a computer?

The connection is listed as USB. The feature text also claims a USB-A to USB-C adapter and plug-and-play operation.

Is a microphone included?

The title and feature text describe a microphone with AI noise cancellation.