🔹 Connectivity & Playback

• Bluetooth music playback with fast device pairing

• Supports TF card + USB flash drive (MP3 format, FAT32)

• Built-in FM radio with auto scanning

• Multi-input audio convenience in one board

🔹 Power & Output

• 5V DC power input (Micro USB)

• Drives 5W speakers with clear audio output

• Supports rechargeable 3.7–4.2V lithium battery

• Integrated charging protection and indicator LEDs

🔹 Controls & Function Buttons

• Play/Pause, Next/Previous, Volume Up/Down

• Mode switching between Bluetooth / USB / TF / FM

• Auto play when USB or TF card is inserted

🔹 Build & Design

• Compact 69 × 20 mm PCB size – easy installation

• Stable signal performance & low power consumption

• Ideal for hobbyists, DIY builders, and audio upgrades

• Supply voltage: DC 7V-15V
• 2. Output power: 10w + 10w (8 load)
• 3. Efficiency: 90%
• 4. Shutdown Current: 4uA
• 5. Quiescent current; 20mA
• 6. SNR: 86%
• 7. Total harmonic distortion: 5W / 1KHz / 8 —- 0.1%
• 8. Frequency range: 20Hz-20KHz
• 9. Input impedance: 15K
• 10. Output Impedance: 8
• 11. Amplifier board size: 30mm * 25mm * 2.5mm
• 1. The power supply voltage limit is 16.5V, do not use more than this voltage.
• 2. The power supply is recommended for 12v, 3A power supply filter better
• 3. 4-8 inch stereo speakers recommended.
• 4. Do not short-circuit the audio output to each other or shorted to ground.
• 5. Carefully check before electricity, ensure wiring is correct before electricity.

• 💎 High-Performance Chip: PAM8610 ensures crisp, clear, distortion-free audio.

• 🎵 Dual Channel Stereo: Enjoy 10W+10W (8Ω) or 15W+15W (4Ω) output for immersive sound.

• ⚡ Wide Voltage Range: Works with DC 8–12V, recommended DC 12V, ideal for batteries & adapters.

• 🔥 Energy Efficient: Class D design = minimal heat & power loss, no extra cooling required.

• 📏 Compact & Portable: Size 45×48×18 mm, easy to install in DIY projects or small enclosures.

• 🎚 Low Distortion & High Fidelity: Harmonic distortion <0.1%, SNR 90%, frequency response 20Hz–15kHz.

• 💼 Versatile Applications: Perfect for MP3/MP4 players, smartphones, laptops, and custom audio projects.

• ✨ PT2399 Digital Echo Processor – High-quality sound effects
• 🎤 Perfect for Karaoke Systems – Professional echo & reverb
• 🎶 Rich & Clear Audio Output – Warm and immersive sound
• 🔊 Ultra-Low Noise (< -90dBV) – Clean audio performance
• ⚡ Low Distortion (<0.5% THD) – Smooth sound reproduction
• 🎚️ 3 Adjustable Controls – Delay, Repeat, Echo tuning
• 🔧 DIY Friendly Module – Easy integration with amplifier
• 🧠 Built-in ADC & DAC – Stable digital processing
• 🔄 Adjustable VCO Frequency – Flexible echo timing
• 🔋 Low Power Consumption – Efficient performance

• 🎤 Dual Microphone Support: Features two dedicated mic ports for group performances and professional duets.

• ✨ Legendary PT2399 Echo: Powered by the original processing chip for the standard echo effect found in professional DVD players.

• 🎛️ 5-Knob Precision Control: Take full command with individual knobs for Mic Volume, Echo, Bass, Tone, and Aux Music Volume.

• ⚡ High-Fidelity Pre-Amp: Equipped with JRC4558 dual op-amps for clean, powerful signal processing and minimal noise.

• 🎶 Independent Mixing: Seamlessly blend your vocals with background music using the Independent Aux Volume control.

• 🔄 Customizable Reverb: The onboard Echo CTRL knob allows you to fine-tune the delay time for a custom acoustic feel.

• 📱 Universal Aux Input: Easily connect your Phone, PC, or CD player as a music source via the standard input pads.

• 🏗️ Sammar Electronics Build: Precision-manufactured (Model SK177) with high-grade components for industrial-level durability.

• 🛡️ Low Noise Floor: Engineered with advanced filtering to ensure a pure signal path free from background hum.

• 📦 DIY Karaoke Ready: The perfect core module for building Custom Karaoke Machines, PA Systems, and Home Theaters.