Nobsound VFD Audio Spectrum Analyzer: Sound Level Meter with MIC & Bluetooth Input and Advanced AGC - for Home Audiophiles & Studio Setups (AK2515 PRO V3)

Parameters Display screen: VFD (Vacuum Fluorescent Display) Resolution: 25 × 15 Frequency range supported: 32Hz-20KHz Display item: music spectrum / sound level / clock Audio signal input: 3.5mm AUX / MIC / Bluetooth Work mode: 1. Auto mode (display music spectrum when music input, display clock mode when no music input) 2. Auto mode without clock display (display music spectrum when music input, enter deep sleep mode when no music input) 3. Music spectrum mode (always) 4. Clock display mode (always) Sound level display mode: 3 kinds 1. Normal mode 2. Mirror mode 1 3. Mirror mode 2 Amplification curve settings: 5 modes 1. Compressed low-frequency 2. Compressed low-frequency to enhance high frequency 3. No enlarging(default setting) 4. Slightly compression low frequency to enhances high frequency 5. Enhance high frequency Music spectrum mode: Normal mode / Invert color mode / Reverse mode / Frequency division mode / Amplified curve mode Real output / Smooth output I / Smooth output II Adjustable items: main light column falling speed / peak holding time / peak falling speed Clock display: year / month / day / hour / minute / second & date Brightness adjustment: 7 levels Font type: 4 kinds Working voltage: DC 5V Dimensions(W*D*H): 175*28*50mm / 6.89*1.10*1.97in Net weight: 189g/1.42lb Package weight: 300g/0.66lb Packing List 1× AK2515 PRO V3 Audio Spectrum Analyzer Board 1× USB Cable (Type-C) 1× 3.5mm Audio Cable 1× 1:2 3.5mm Cable 2× Acrylic Board 1 Set × Installation Screws

• High-Resolution VFD Display: The 25×15 high-resolution vacuum fluorescent display presents each frequency band clearly and accurately. When no audio is playing, it even serves as a precise clock, adding functional style to your setup.
• Wide Frequency Range & Precision: A wide 20Hz–20kHz frequency range captures everything from deep bass to sparkling treble, so no sound detail goes unnoticed. An integrated noise filter eliminates hum and interference, ensuring the on-screen bars reflect your audio with clean precision.
• AUX, MIC & Bluetooth Connectivity: The upgraded AK2515 PRO V3 adds Bluetooth 5.0 input alongside its 3.5mm AUX and mic ports for maximum flexibility. Stream music wirelessly from your phone or connect devices via cable – you can even use the 3.5mm jack as an output in Bluetooth mode, effectively turning this spectrum analyzer into a Bluetooth receiver for your sound system.
• Advanced AGC & Display Modes: The built-in automatic gain control algorithm adapts the display to your audio’s volume in real time, keeping the spectrum bars vivid and balanced at any sound level. Choose from multiple gain settings and three spectrum display modes (from real-time to smoothing) to fine-tune how the visuals respond to your preference.
• Customizable & User-Friendly Design: Tailor the visual experience with 7-level brightness, adjustable peak-hold and fall speeds, and multiple spectrum or clock display styles. It remembers your preferred settings (power-off memory) and offers convenient auto-switch and deep-sleep modes, making it ideal for long-term use in home audiophile setups or studios.