[Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (Black)

Easy to setup and it works like a champ! Now I can zone out on lights. The remote is nice otherwise it would be hard to operate.

The Quality & Functionality is good but it doesn’t have some of the visuals from the older one & is missing the red lights on the bottom. Is easy to use & it gives you old school vibes when jamming your songs.👍🏼

On October 27, 2025, I purchased the [Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (from Amazon). It stopped working after 2 months of use. The device would not turn on. I followed steps in the "self troubleshooting" instructions to no avail. I was able to hear a sound when I plugged the device to power but the display did not turn on at all. On January 16, 2026, I sent an email to the Douk Support team to ask about options when a device stops working. They responded right away and stated that I described what they believed to be a defective capacitor on the board and asked if I was "willing to weld it to fix it" so they could send me "the needed capacitor" for me to replace on my own. I was honest and told them I could not weld it to fix it because I do not possess the tools or skill to do so. They responded by asking for my shipping address so they could send a free replacement. By February 16, I had the replacement on hand. Douk's support stood by their product and did NOT hesistate to fix my problem I had with the original defected VFD Audio Spectrum Analyzer. Their attention to my sitation was greatly appreciated.

I like the features and visuals. Good item. Not many to choose from in the market. This one is good on size and value. Doesn't take up too much desk space. I paired it with VU meter, shown on right side. Seller should add more similar projects, I would buy from again in a heartbeat. I do wish time could be shifted to 12 hr vs 24 hr. I would also like to buy other colors, amber would be nice. I don't mind the slightly confusing UI, I just set it and forget it. Overall very happy with product. Thank you.

If you're not afraid to experiment with the remote control, you can figure this thing out. The instructions are quite lacking. I don't have anything plugged into it. I just used the microphone, don't want to run my signal path through something cheap like this haha! Haha! I mainly bought it for the clock because I really like these types of displays. And as a clock it's awesome. It does have some nice options for the spectrum analyzer and it does work well for that. With the microphone. It's just rather cryptic on how to use it. Could have used with a much better labeled remote control rather than a generic one. But for the price I paid I guess it's to be expected. I really enjoy having it though, looks really good. Just sitting there displaying the time and looks nice when it's in spectrum analyzer mode. Just love these type of vacuum fluorescent displays.

Just like one of the reviewers who shared a video, this thing is great. He is right in saying the MIC alone function is horrible. Since I use my BT from my PC to send audio to my receiver, all I had to do was get a rca adapter to 1.5m stereo out to IN 1 or 2 of the spectrum analyzer. I plugged the rca side into my zone 2 pre out and the other end into the spectrum analyzer. then turn up the volume on zone 2 since most don't utilize zone 2. it works great. be sure when you receive this, it has the remote as it does simplify things when setting up. ****update**** 2-27-2025 the product is now failed and no longer powers on. I've tried to reach the company with no response. save your money and do not purchase this item. there is no product support. ****update*** 3-9-2025 after many days of no response I added the number on their web page to WhatsApp and reached out. Someone after a couple days responded but by this time I managed to get Amazon to refund the item and send the failed one back despite they charging me for a damaged item? Makes no sense. This company just sent out a replacement with out charging me. I appreciate their help and kindness to send a new one. I adjusted my review to 5 stars because they deserve it despite the initial no to slow response.

When I discovered this product I had high hopes that it would add a bit of a light show when playing my audio equipment. Unfortunately this may be one of the worst designed user interfaces i have ever come across. I have spent hours trying to understand how to program this spectrum analyzer and have come to the conclusion it is basically unusable as a spectrum analyzer. If you finally find a setting you like you will have no idea how to recreate it easily again. Unplugging and plugging back in seems to reset this box, and just when you may like what it is doing.....this thing's clock feature will flash and roll randomly. The deal breaker is the clock feature CANNOT be turned off. I thought I was buying a spectrum analyzer.....not a clock. Either mine is broken or it was designed horribly. It's a shame. If it was much easier to use and had a better UI this may have been a keeper. Also adding the option to change the display colors would add value to this item. There is a market for this company's products .....but they are going to have to put much more thought into designing them better. Another thought....can they make the print ANY more tiny in the direction manual they send. I had to take a photo with my phone and enlarge it to even begin to read and understand it. Jeeze ......

Just what I was looking for, a graphic frequency display for my setup (this is daisy-chained between my Mac and my amplifier). The instruction manual is lacking, but it doesn't take long to figure things out (hint: use the remote control for everything). Once it's set up, you shouldn't have to touch it again.

Superb. One word. Got it for 8.2k

If you are a lover of music, this is a must add-on to your existing audio set-up. The 25 band audio spectrum analyzer is shipped along with user manual, warranty card, type-C USB cable for powering the unit and a remote control. AAA batteries for the remote control were not included. Just insert the AAA batteries in the remote control, power the unit with a good quality 5V 2A USB power supply and an audio patch cable and you are ready to go. Excellent visual experience of the frequency response of the audio signal. Added benefit is the BLUETOOTH 5.0 feature which makes your audio set-up wireless to connect to portable devices like Laptops, mobile phones and PC's. The received BLUETOOTH audio quality is excellent as it uses the latest BLUETOOTH 5.0 protocol. It can be also used as an extremely accurate digital clock when you are not listening to music. The product was very well packed. Extremely satisfied with the quality and build of the product. Go for it.

Pretty nifty. Looks good.