uxcell Super Mini PAM8403 2*3W D Class Digital Amplifier Board 2.5-5V USB Power 2PCS Product Name : Super Mini Digital Power Amplifiers Board;Model : GY-30 USB Power : 2.5V-5V;Power : 3W IC : PAM8403;PCB Size : 2.1 X 1.8cm/0.8" x 0.7"(L*W) Material : PCB, Alluminum;Main Color : Green, Silver Tone Net Weight : 5g;Package Content : 2 Pcs x Super Mini Digital Power Amplifiers Board