UGREEN USB HD Webcam — CM678

The UGREEN USB HD Webcam is a full HD 1080p plug-and-play camera designed for everyday video calling, online learning, live streaming, and desktop computing use. It delivers clear, stable 1080p video at 30 frames per second through a fixed-focus glass lens, pairs that with built-in dual noise-cancelling microphones, and connects via a 2-metre USB-A cable with no driver installation required. The CM678 is compatible with Windows, macOS, Linux, and Android, and works immediately across all major conferencing and streaming platforms.

Image Quality: Fixed Focus and Auto Light Correction

The CM678 uses a 2 MP CMOS sensor with a full HD glass lens, producing 1080p video at 30 fps. Unlike autofocus webcams that hunt for focus during movement, the CM678’s fixed-focus lens is pre-calibrated for sharpest results within an optimal range of 0.5 m to 5 m — the distance that covers virtually all standard desk, monitor-top, and table setups. Fixed focus removes focus lag entirely, meaning the image remains consistently sharp without hunting or momentarily blurring when the subject shifts.

Auto light correction uses UGREEN’s DRC (Dynamic Range Compression) technology to continuously adjust colour temperature and exposure in response to changing ambient light. This balances the image across mixed or backlit conditions — for instance, when a window is visible behind the speaker — and maintains consistent brightness without manual camera settings adjustments. Additionally, the 85° diagonal field of view (75° horizontal, 45° vertical) frames one or two people at a standard monitor-to-desk distance comfortably, without the wide-angle distortion that can make faces appear unnaturally stretched at the frame edges.

Audio: Dual Omnidirectional Microphones

Two omnidirectional microphones are integrated into the CM678 housing, with a voice pickup range of up to 3 metres. The 2D digital noise reduction processing filters out consistent background sounds — keyboard clicks, fan noise, air conditioning — from the audio signal before it reaches the platform. This reduces the need for in-app noise suppression settings, which often degrade voice quality when applied too aggressively. For solo desk use with the camera mounted at monitor height, the 3-metre pickup range is more than sufficient; users in larger rooms or shared spaces who need a longer pickup range should consider the UGREEN USB 2K Webcam CM778, which extends microphone coverage to 5 metres alongside its 2K resolution upgrade.

Mounting and Positioning

The CM678 ships with an integrated mounting clip that attaches to the top of a monitor or laptop lid, a fold-flat base for desktop placement, and a standard ¼-inch tripod screw hole for third-party desk stands or arm mounts. The built-in gimbal ball supports 360° horizontal rotation and approximately 15° vertical tilt, allowing fine angle adjustment once mounted without repositioning the clip itself. The 2-metre USB-A cable provides enough reach for monitors positioned at the rear of a deep desk or for PC towers placed below desk level.

Technical Specifications

Source: ManualsLib official CM678 datasheet (P/N: 15728), UGREEN Sri Lanka product page, and verified regional reseller listings.

Use Cases

Remote Work and Video Conferencing

The CM678 suits professionals who need a reliable, low-maintenance webcam for daily video calls on Zoom, Microsoft Teams, or Google Meet. The fixed-focus lens eliminates the inconsistency that can occur with autofocus systems during on-camera presentations, and the auto light correction handles the variable ambient lighting common in home offices without requiring supplementary lighting equipment. The plug-and-play USB connection means the camera is immediately recognised on any supported device without IT support or driver management.

Online Teaching and Education

Educators mounting the CM678 on a monitor or laptop at standard seated distance fall within the 0.5–5 m optimal focus range, where the fixed lens performs at its clearest. The 85° field of view is wide enough to show a seated teacher and a portion of their immediate workspace — useful when demonstrating materials or referring to physical items during a lesson. Furthermore, the 2-metre cable provides enough length for the camera to be positioned on a monitor at the back of a desk without cable tension.

Live Streaming and Content Creation

For streamers using OBS Studio or similar software, the CM678 provides clean 1080p output at 30 fps that is appropriate for standard-quality streams where bandwidth and encoding overhead are considerations. The fixed focus performs reliably at a consistent seating distance, producing a stable image without the frame-by-frame focus shifts that can appear during encoding at lower bitrates. The ¼-inch tripod thread also opens up desk-stand and arm-mount positioning options common in streaming setups.

Desktop Users Without a Built-In Camera

The CM678 is a practical addition to desktop PCs and older laptops that lack an integrated camera. The straightforward clip and plug-and-play connection require no technical configuration, and the three mounting options suit a wide range of desk arrangements. Users who need sharper 2K resolution or a longer microphone pickup range for conference room use should additionally consider the UGREEN USB 2K Webcam CM778.