Nuroum C40 Review: An All-in-One 4K Conference Camera, Tested with Its Expansion Mic and Wireless Dongle

This is the English edition of a review from my Japanese YouTube channel, iestaLife. I review gadgets from my home studio in Japan. Nuroum provided the C40, the expansion mic and the wireless dongle for this review (sponsored). The product link below goes to Nuroum’s Japanese website.

Quick take

The Nuroum C40 is an all-in-one conference camera: a 4K, 120° wide-angle webcam, microphones and a speaker in one light cylinder. On its own it handles a small meeting room well. Add the expansion mic for bigger rooms, and the wireless dongle if you want to lose the USB cable — with only a slight delay.

Top of the Nuroum C40 with the expansion mic connected — The C40 with the expansion mic plugged in

What I tested

Nuroum C40 (4K, 120° wide-angle camera with built-in mics and speaker)
The optional expansion microphone
The optional USB wireless dongle
Connected to a Mac and captured in OBS

What I found

The picture is very clean — sharper than my Mac’s camera, in a bright room. The 120° view is wide; once you zoom in, you can pan and tilt the frame.
Sitting directly on a table, the camera is a little low and looks up at you. There is a tripod-style mount underneath, so raising it a bit would look more natural.
The built-in mic is very sensitive and still picked me up when I turned sideways.
The expansion mic plugs into the mic input and lights up. The built-in mic stays active, and the expansion mic sounded as good or better. Its mute button mutes the whole system.
The dongle paired automatically and sent video and audio with no cable to the computer. Picture quality dropped very slightly, and there was a fraction-of-a-second delay — fine for a video call, but watch lip sync if that matters to you.
The speaker is much clearer than a laptop’s for voices. Bass is light and it is mono, but it is fine for background music.
It feels surprisingly light for its size (about a 1.5-litre bottle). The remote handles camera and mic on/off, volume, speaker mute and zoom. Batteries for the remote were not included.

Buttons on top of the C40 and the remote control — Top buttons and the included remote

Which setup?

C40 alone	Small meeting rooms; covers a fair number of people
+ expansion mic	Larger rooms, or 10–20 people where far seats need picking up
+ wireless dongle	When you don’t want a USB cable to the computer

Who it’s for

Teams that hold video calls with several people in one room, and anyone who wants camera, mic and speaker sorted with one device. If you only join calls alone, your laptop camera may be enough. In the video I mention roughly ¥40,000 for the C40 alone and roughly ¥80,000 for the three-piece set (my approximate figures at the time of recording).

Watch the review

【会議室にこれ1台】Nuroum C40＋拡張マイク＋ワイヤレス接続を全部試したら、Web会議の不安が全部解消した

The video is in Japanese; YouTube can show auto-generated captions. Useful chapters: 05:41 camera quality on a Mac, 10:08 expansion mic, 12:28 wireless dongle, 16:23 speaker test.

Limitations

I did not test the AI auto-framing feature. Camera and mic checks were done in my bright home studio with OBS rather than in a real multi-person meeting, and I didn’t measure the wireless delay precisely.