Detail Super Mini Stereo Audio Amplifier 2x3W 5V PAM8403
Power : 2x3W (4 Ohm / 8 Ohm) Excellent Noise Suppression Working Voltage : 2.5 - 5V (can be directly connected to PC USB Power)
Note : The left and right channel output terminal "negative" and can not be connected together, otherwise it will burn IC, and energized preceded connected speaker (load).