--- product_id: 504408632 title: "[Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (Silver)" brand: "douk audio" price: "€ 134.87" currency: EUR in_stock: true reviews_count: 11 category: "Douk Audio" url: https://www.desertcart.pt/products/504408632-upgraded-vfd-audio-spectrum-analyzer-bluetooth-5-0-receiver-3 store_origin: PT region: Portugal --- # ±3ppm ultra-precise RX8025T clock 25×15 high-res VFD display Bluetooth 5.0 + 2× 3.5mm AUX inputs [Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (Silver) **Brand:** douk audio **Price:** € 134.87 **Availability:** ✅ In Stock ## Summary > 🎶 Elevate your audio game with retro-futuristic flair! ## Quick Answers - **What is this?** [Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (Silver) by douk audio - **How much does it cost?** € 134.87 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/504408632-upgraded-vfd-audio-spectrum-analyzer-bluetooth-5-0-receiver-3) ## Best For - douk audio enthusiasts ## Why This Product - Trusted douk audio brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Customizable Display & Controls:** Adjust brightness, gain, peak hold, and falling speed with remote control—tailor your audio experience with ease. - • **Visualize Your Sound Like a Pro:** High-res VFD spectrum analyzer with 5 dynamic display modes for real-time audio insights. - • **Precision Timekeeping Meets Style:** Built-in crystal oscillator ensures clock accuracy within 1 minute/year—tech that keeps you on schedule. - • **Seamless Multi-Source Connectivity:** Bluetooth 5.0 plus dual AUX inputs let you effortlessly switch between devices and amplify your vibe. - • **Sleek, Durable Design for Your Desk:** CNC-machined aluminum and transparent acrylic case combine premium build quality with compact elegance. ## Overview The [Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver combines a high-resolution vacuum fluorescent display with advanced audio input options including Bluetooth 5.0 and dual 3.5mm AUX ports. It features a precision RX8025T crystal oscillator clock, customizable visual effects, and remote control operation, all housed in a compact CNC-machined aluminum and acrylic case. Perfect for professionals seeking both style and technical accuracy in audio visualization and switching. ## Description Warm Tips: 1. 3.5mm AUX1 and 3.5mm AUX2 cannot input at the same time, only one audio source channel (MIC / Bluetooth / IN1 / IN2) can input at a time. Parameters: Display screen: VFD (Vacuum Fluorescent Display) Resolution: 25 × 15 Frequency range supported: 80Hz-16KHz Display item: music spectrum / clock Audio signal input: MIC / Bluetooth 5.0 / 2 groups of 3.5mm AUX Audio signal output: 1 group of 3.5mm AUX Work mode: 1. Auto mode (display music spectrum when music input, display clock mode when no music input) 2. Clock display mode (always) Clock display: 2 kinds Music spectrum display: 5 kinds Music display mode: AGC+customized output curve (Real output / Smooth output) Adjustable items: main light column falling speed / peak holding time / peak falling speed Brightness adjustment: 5 levels+auto adjustment Gain adjustment: 5 levels Power-off memory function: support Remote control: support Working voltage: DC 5V Dimensions (W*D*H): 184*75*66mm / 7.24*2.95*2.60in Net weight: 322g / 0.71lb Package weight: 500g / 1.10lb Packing List: 1× VFD253 Audio Spectrum 1× USB Cable (Type-C) 1× Remote Control 2× Pad (stick to the bottom) 1× User Manual Review: ITEM FAILED AND NO RESPONSE FROM THE COMPANY. - 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 desertcart 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. Review: Looks nice with my black receiver - 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.👍🏼 ## Features - VFD253 integrates mutiple functions into a whole: As an audio spectrum analyzer: adopts dedicated green VFD display screen with 25 × 15 high resolution, guarantee the accuracy of each frequency band. - As a Bluetooth receiver and audio switcher: besides microphone pickup, also with Bluetooth 5.0 and 2 groups of 3.5mm AUX input, works perfectly with your phone/PC/game player/amplifier/speaker etc. As a high-precision clock: using RX8025T built-in crystal oscillator whose clock accuracy is ±3ppm, year error within 1 minutes, very cool and interesting. - Wide frequency range & special AGC display: 80Hz-16KHz frequency sweep, high-precision display even can do frequency point test. Speical AGC algorithm and customized output curve, ensure ideal visual effects even the input signal is in a small to large range, avoid that no display when input low and display in full screen when input high. - Many adjustable items & display effects: gain, brighntness, falling speed of main light column, holding time and falling speed of the peak can be adjusted separately. 5 music spectrum display mode and 2 clock display mode, all settings with power-off memory function, no need to set again after restarting. - Attractive looking and convenient use: with remote control, easy to adjsut all settings and see the music level status in real time and every slight change of sound.CNC machined aluminum and transparent acrylic case, both solid and beautiful, compact design not occupy your desktop space. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BKQ1K551 | | Best Sellers Rank | #218,496 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #55 in Spectrum Analyzers | | Customer Reviews | 4.3 4.3 out of 5 stars (53) | | Date First Available | October 27, 2022 | | Item Weight | 1.21 pounds | | Item model number | VFD253 | | Manufacturer | Douk Audio | | Product Dimensions | 2.95 x 7.24 x 2.6 inches | ## Product Details - **Audio Output Mode:** Stereo - **Brand:** Douk Audio - **Color:** Silver - **Compatible Devices:** Amplifier, Preamplifier - **Connectivity Technology:** Auxiliary, Bluetooth, MIC - **Connector Type:** 3.5mm Jack - **Controller Type:** Hand Control - **Product Dimensions:** 2.95"D x 7.24"W x 2.6"H - **Special Feature:** Built-In Bluetooth - **Surround Sound Channel Configuration:** 2 ## Images ![[Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (Silver) - Image 1](https://m.media-amazon.com/images/I/71+CwJWqKiL.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: Is the remote IR?** A: Yes **Q: How does the bluetooth feature work, if my speakers are blue tooth ... I normally use my phone and have edifier speakers. Android cancelled dual bt..?** A: Hello. Its Bluetooth is only for receiving. You can connect your phone with this device via Bluetooth. And then use wire to connect this device to your edifier active speakers. **Q: How is the mic pickup? Does it work well...** A: The mic pickup is surprisingly good. ## Customer Reviews ### ⭐⭐⭐⭐⭐ ITEM FAILED AND NO RESPONSE FROM THE COMPANY. *by K***X on January 4, 2025* 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. ### ⭐⭐⭐⭐ Looks nice with my black receiver *by R***A on October 13, 2025* 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.👍🏼 ### ⭐⭐⭐⭐⭐ Super cool!!!! *by D***N on January 2, 2025* 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. ## Frequently Bought Together - [Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (Silver) - CableCreation 3.5mm to RCA Cable, Angle 3.5mm Male to 2RCA Male Auxiliary Stereo Audio Y Splitter Gold-Plated for Smartphones, MP3, Tablets, Speakers, Echo Dot, Home Theater, HDTV, 10FT/3M - Tan QY 2RCA to 2RCA Cable 3Ft, Gold-Plated 2 RCA Male to 2 RCA Male Stereo Audio Cable for Home Theater, HDTV, Gaming Consoles, Hi-Fi Systems (3Ft/1M) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/504408632-upgraded-vfd-audio-spectrum-analyzer-bluetooth-5-0-receiver-3](https://www.desertcart.pt/products/504408632-upgraded-vfd-audio-spectrum-analyzer-bluetooth-5-0-receiver-3) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-04-24*