1.Pictures of Product Mini Professional Audio Power Amplifier 2. Sketch Map And Description HY880CD Front Panel1, USB Port2, SD Card Ports3, CD Player Volume Control4, AUX 1,2 Selector5, 6.35mm Microphone Input6, Power Switch7, AXU Volume Control8, MIC1,2 Volume Control9, Power LED HY880CD Rear Panel1, DC Fuse2, 110V or 220V AC Input3, AC..