WMYCONGCONG 10 PCS Super Mini PAM8403 23W D Class Digital Amplifier Board 2.5-5V USB Power Supply

Specification: Product Name: Super Mini Digital Power Amplifiers Board Operating voltage: 2.5V-5.5V Power: 3W IC: PAM8403 PCB Size: 21 x 18mm/0.8 x 0.7"(L*W) Material: PCB, Alluminum Color: Green, Silver Tone Note: The "negative" of the left and right channel output terminals cannot be connected together, otherwise the IC will be burned, and the speaker (load) should be connected before power-on. Package Content: 10 x Super Mini Digital Power Amplifiers Board.