High-efficiency speaker DIY kit--Clear sound output, low noise, bring you the best listening experience. Any 5V power supply can be used, suitable for batteries or portable electronic products.
2" 4Ohm 3W Speaker--Diameter: 53mm; Height: 30mm; Rated power: 3W; Rated impedance: 4Ω; Sensitivity: 100 dB/W.
With PAM8403 Amplifier Board--DC 5V digital power Amp module 2 Channel 3W+3W, easy and smooth to adjust the volume and control the power switch with potentiometer.
Package Includes--2* 2" 4Ohm 3W Speakers + 2* PAM8403 Amplifier Boards.
Note: 1. Do not apply power to the amplifier without speakers connected, this will result in damage to the amplifier; 2. Please make sure operating voltage less than 5.5V, or the amplifier will be damaged.

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