Tag Archives: bluetooth

Demo #8: Unboxing and Product Review of Rown Fusny R03U Wireless Mono Headset | In The Lab

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This post is part of my video blog and you can find more information about this video over here.

You can support this channel on Patreon: patreon.com/JohnElliotV

In this video we unbox and demo the R03U Wireless Mono Headset sent to me for review by Rown Fusny. This headset supports wireless connectivity for both USB and Bluetooth. I really enjoyed using this product and their customer support was first class.

It’s a mono device which means it only has a speaker for one ear, which is really good for your situational awareness because you can hear what’s going on in your environment through your other ear. Both the headphone and the microphone worked properly in both USB and Bluetooth mode.

I wasn’t able to get the USB mode to work on my Windows 10 machine, but I don’t know if that was related to the USB hardware on that computer or if it had to do with Windows 10 support for the device. I was able to get USB mode working on a Windows 11 Pro computer and one of my Debian 12 (bookworm) computers. I tested the Bluetooth mode on both iPhone 6s and iPhone 8.

One thing that I needed explained to me was that after you pair your Bluetooth device you may need to double click the power button on the headset in order to toggle from USB mode over to Bluetooth mode in order to activate the device. That’s why I had to contact customer support, because I was confused by this.

The device gives you status updates via audio. So if you toggle to USB mode it says “USB mode” and if you toggle to Bluetooth mode it says “Bluetooth mode”. If you disconnect the USB dongle or unpair the Bluetooth connection it says “disconnected”.

There is a microphone mute button on the headset and there are volume control buttons too. I tested the volume control buttons via Bluetooth but forgot to test via USB… hmm. Gimme a tick. Yep, the volume controls work on USB too!

Overall I was very pleased with this device and I would happily recommend this product!

In preparing this video I made some notes about my headphones which are still available on my wiki.

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Yum Cha 16MP USB CameraThis is an image of the product.

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Bluetooth signal quality on MacBook Pro

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If you press the Option key then click the Bluetooth icon on your MacBook Pro then MacOS will show you the signal strength (RSSI) and other info about your Bluetooth devices. RSSI is the “Received Signal Strength Indicator” as explained by ChatGPT. The current RSSI for my bluetooth speakers is -67dBm, which ChatGPT explains:

An RSSI value of -67 dBm is generally considered a good signal strength when it comes to WiFi, and the same could be roughly said for Bluetooth and other wireless communication technologies. In terms of qualitative interpretation:

  • -30 to -50 dBm: Excellent signal strength. This is about as good as it gets. Usually, this is only seen when you’re very close to the access point or device.
  • -50 to -70 dBm: Good signal strength. For most general applications, this range provides a reliable, strong connection. Voice, streaming, and even video applications usually work well in this range.
  • -67 dBm: This specific value is often cited in WiFi scenarios as the minimum strength for reliable voice applications.
  • -70 to -90 dBm: Fair signal strength. The connection is more susceptible to interference and might not be reliable for all applications. Data rates will be lower, and minor obstructions can cause the signal to drop.
  • Below -90 dBm: Poor signal strength. The connection is unreliable and might drop frequently. It’s challenging to maintain a stable connection in this range.

So, an RSSI of -67 dBm is generally good for most applications, including voice and streaming. However, the actual performance can vary based on the specific wireless technology in use, the environment (presence of physical obstructions, other interfering signals), and the application’s specific requirements.

Bluetooth!

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For a long while now I have been having intermittent problems with the audio in my lab. I stream the GoaPsy channel from di.fm, and I really love it, but not when there’s skipping! I figured the problem was related to latency and jitter on my broadband connection, and if so, there was little to be done, except to wait for network conditions at my ISP to change.

But this evening I noticed that when I sat close in to my workstation to type the skipping would start. Then if I moved back in my chair, it would stop. I found I could actually cause the skipping to start or stop just by moving around in my chair!

Turns out the problem wasn’t my internet connection, the problem was the bluetooth connection between my laptop and my speakers! To fix the problem I got underneath my desk and moved my sub woofer about one foot to the left. Now when I move around in my chair my music doesn’t skip anymore! Happy days!