COSMIC-108 / AT108 Bluetooth Audio Amplifier Board with USB, Type-C Power & TF Card | Stereo DIY Speaker Module

Upgrade your DIY audio projects with the COSMIC-108 / AT108 Bluetooth Audio Amplifier Board 🔊 — a compact, feature-rich module designed for modern speaker systems, repair work, and custom audio builds.

From your images, this board comes with Type-C power input, USB playback, TF card slot, onboard control buttons, and speaker output terminals, making it a complete plug-and-play audio solution.

✨ Key Features & Highlights

• 📶 Wireless Bluetooth Audio Support
  Seamlessly connect mobile, laptop, or tablet for wireless music streaming.
• 🔌 Modern Type-C Power Input
  Stable and efficient power supply via USB Type-C (5V) — no bulky adapters needed.
• 💽 Multiple Playback Options
  Supports:
  
  • USB Pen Drive
  • TF Card (Memory Card Slot)
  • Bluetooth Mode
• 🎛️ Dedicated Control Buttons (Onboard)
  Easy operation with:
  
  • ▶️ Play / Pause
  • ⏮️ Previous / Volume Down
  • ⏭️ Next / Volume Up
  • 🔄 Mode Selection
• 🔊 Stereo Speaker Output
  Clearly marked:
  
  • B+ / B- (Battery/Input)
  • SP+ / SP- (Speaker Output)
• 📡 Built-in PCB Antenna
  Strong and stable Bluetooth signal without external antenna.
• ⚙️ High Stability IC + Crystal Oscillator
  Ensures:
  
  • Better sound processing
  • Stable frequency operation
  • Low noise performance
• 🔧 DIY Friendly Design
  Clearly labeled solder points make installation easy for:
  
  • Technicians
  • Students
  • Hobbyists

📊 Technical Specifications