---
product_id: 627117433
title: "[Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (Black)"
brand: "douk audio"
price: "€ 254.95"
currency: EUR
in_stock: true
reviews_count: 3
category: "Douk Audio"
url: https://www.desertcart.pt/products/627117433-upgraded-vfd-audio-spectrum-analyzer-bluetooth-5-0-receiver-3
store_origin: PT
region: Portugal
---

# ±3ppm ultra-precise clock 25-band high-res VFD display Bluetooth 5.0 + dual AUX inputs [Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (Black)

**Brand:** douk audio
**Price:** € 254.95
**Availability:** ✅ In Stock

## Summary

> 🎶 Elevate your audio game with precision and style — don’t just listen, experience sound!

## Quick Answers

- **What is this?** [Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (Black) by douk audio
- **How much does it cost?** € 254.95 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/627117433-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

- • **Precision Timekeeping Meets Style:** Built-in RX8025T crystal oscillator keeps time within 1 minute/year, doubling as a sleek digital clock.
- • **Fully Customizable Visual Experience:** Adjust gain, brightness, peak hold, and choose from 5 spectrum modes with power-off memory for hassle-free use.
- • **Seamless Multi-Source Audio Switching:** Bluetooth 5.0 plus two 3.5mm AUX inputs let you effortlessly toggle between phone, PC, mic, and more.
- • **Visualize Your Sound Like Never Before:** 25×15 high-res VFD spectrum analyzer delivers pinpoint frequency accuracy from 80Hz to 16KHz.
- • **Premium Build with Remote Control Convenience:** CNC aluminum & acrylic case looks stunning on any desk, while remote control puts all settings at your fingertips.

## Overview

The [Upgraded] VFD Audio Spectrum Analyzer VFD253 combines a 25-band high-resolution vacuum fluorescent display with Bluetooth 5.0 and dual 3.5mm AUX inputs for versatile audio source management. It features an ultra-precise built-in clock, multiple customizable display modes, and a premium CNC-machined aluminum and acrylic chassis. Remote control and power-off memory enhance user convenience, making it a must-have for audiophiles and professionals seeking real-time sound visualization and stylish desktop presence.

## 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: If u lov music- this add another dimension to it. - Superb. One word. Got it for 8.2k
Review: 25 BAND VFD AUDIO SPECTRUM ANALYZER. - 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.

## 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 | B0CFD69C56 |
| Audio Output Mode | Stereo |
| Audio Output Type | Speakers |
| Best Sellers Rank | #671,791 in Electronics ( See Top 100 in Electronics ) #283 in Car Bluetooth Kits |
| Box Contents | 1*audio spectrum; 1*usb cable; 1*remote |
| Brand | Douk Audio |
| Brand Name | Douk Audio |
| Colour | Black |
| Compatible Devices | Amplifier, Preamplifier |
| Connectivity Technology | Auxiliary |
| Connector Type | 3.5mm Jack |
| Control Method | Remote |
| Controller Type | Hand Control |
| Customer Reviews | 4.4 out of 5 stars 53 Reviews |
| Item Dimensions D x W x H | 6.6D x 18.4W x 6.6H Centimeters |
| Manufacturer | Douk Audio |
| Model Number | VFD253 |
| Network Connectivity Technology | Auxiliary |
| Number of Channels | 2 |
| Other Special Features of the Product | Built-In Bluetooth |
| Special Feature | Built-In Bluetooth |
| Supported Internet Services | Not Supported |
| Surround Sound Channel Configuration | 2 |
| Wireless Technology | Bluetooth |

## Product Details

- **Brand:** Douk Audio
- **Connectivity Technology:** Auxiliary
- **Controller Type:** Hand Control
- **Special Feature:** Built-In Bluetooth
- **Compatible Devices:** Amplifier, Preamplifier
- **Connector Type:** 3.5mm Jack
- **Audio Output Mode:** Stereo
- **Surround Sound Channel Configuration:** 2
- **Colour:** Black
- **Product Dimensions:** 6.6D x 18.4W x 6.6H Centimeters

## Images

![[Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (Black) - Image 1](https://m.media-amazon.com/images/I/61QvmJ707CL.jpg)
![[Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (Black) - Image 2](https://m.media-amazon.com/images/I/81kGW0wWtaL.jpg)
![[Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (Black) - Image 3](https://m.media-amazon.com/images/I/81JLm0U9z1L.jpg)
![[Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (Black) - Image 4](https://m.media-amazon.com/images/I/81WXYl18M8L.jpg)
![[Upgraded] VFD Audio Spectrum Analyzer Bluetooth 5.0 Receiver 3.5mm AUX Selector (Black) - Image 5](https://m.media-amazon.com/images/I/81iHNc8HrrL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ If u lov music- this add another dimension to it.
*by A***Y on 22 December 2025*

Superb. One word. Got it for 8.2k

### ⭐⭐⭐⭐⭐ 25 BAND VFD AUDIO SPECTRUM ANALYZER.
*by E***O on 23 August 2025*

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.

### ⭐⭐⭐⭐⭐ Nice independent graphic equaliser.
*by C***G on 17 June 2025*

Pretty nifty. Looks good.

## Frequently Bought Together

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-04-23*