uxcell 5V Super Mini PAM8403 Class Digital USB Power Amplifier Board 2 Pcs Country of Manufacture: CHINA; Material: PCB, Alluminum Net Weight: 4g; Package Content: 1 x Super Mini Digital Power Amplifiers Board Brand: Assisi; Main Color: Green, Silver Tone USB Power: 5V; IC: PAM8403 PCB Size: 2.1 x 1.8cm/0.8" x 0.7"(L*W)