
PA Audio System Professional 20W Class D Portable Amplifier. Class D Amplifier Technology: Offers higher power efficiency and stability compared to Class AB amplifiers. Compact and Portable Design: Small and light construction with plastic case, easy to carry. Versatile Input Options: Supports MIC, AUX, USB, and SD card inputs for diverse audio sources. Built-in FM Radio and MP3: Integrated FM tuner and MP3 Bluetooth functionality for entertainment. Dual Band Tone Control: Adjustable Treble and Bass controls for customized sound quality. Multiple Color Options: Available in Silver or Black finishes to match different styles. OEM and ODM Services: Custom branding and design services available for business partners. Low Distortion Output: Total Harmonic Distortion (THD) is less than 1% at 1/3 voltage.