Check the listing for details. 5pcs PAM8403 Mini 2 Channel 3W Class D Stereo Audio Power Amplifier Module Board. Color: Green, Condition: New. Listed at 5.99 USD. eBay PAM8403 Ultra-Compact 2*3W Class D Digital Power Amplifier Board Overview: The PAM8403 is a highly efficient, 2-channel stereo Class D digital power amplifier board, capable of delivering 3W+3W of power. Its ultra-miniature design, roughly the size of a coin (1.85 x 2.11 cm), makes it ideal for a wide range of applications, particularly in portable and digital devices. Key Features: Superb Noise Suppression: No audible noise even when no audio input is present and the ear is close to the speaker. Power Supply Versatility: Can be powered by a computer's USB port, USB power banks, mobile phone chargers, or lithium batteries. High Efficiency: Up to 90%, capable of driving 4Ω or 8Ω small speakers. Output Power: Capable of delivering 3W (left channel) + 3W (right channel) with a 5V power supply. LC Filter-Free Design: Offers clear sound quality and high energy output. Dual-Sided PCB: Minimizes ground potential imbalance and crosstalk between channels. Machine Soldering: Ensures superior soldering quality over manual soldering. Specifications: Model: PAM8403 Operating Voltage: 2.5V-5.5V (Do not exceed 5.5V) Speaker Compatibility: 4-8 Ohms; recommended 4 Ohms Size: Ultra-small footprint, 1.85cm x 2.11cm Rated Working Voltage: 2.5-5V, limit working voltage 5.5V Additional Information: Built-in Protection: Features short-circuit over-current protection and over-temperature protection (shuts down at 140°C ±15°C). Note: The negative outputs for the left and right channels should not be connected together to prevent damage to the IC. Applications: Suitable for LCD TVs, monitors, laptops, portable speakers, portable DVD players, gaming systems, phones/hands-free devices. Installation Caution: Connect speakers before powering on to avoid damage to the chip. Avoid excessive input audio signal to prevent signal clipping. Package Contents: PAM8403 Class D Stereo Audio Power Amplifier Module (5 pieces)