XH-A158 PAM8403 Bluetooth 5.0 Amplifier Board Product name: PAM8403 Bluetooth 5.0 Amplifier Board Bluetooth Ver.: 5.0 Chip model: PAM8403/EG8403 Power supply voltage: DC 5V Magnification: 4 times Number of channels: Two-channel stereo Output power: 5W * 2 Size: 45x42x25mm