1. Professional karaoke sound box.The output power is 200W. 2. The frame which is made of high density mid-fiberboard is burly and Enduring. 3. Adopting original and professional speaker, we promise that you can use it rightly for 3 years.4.Low-volume unite adopt superfine material, low-volume adopt 4 layers loop double magneto-steel .5. With particular deadening, it reduce the resonance, and the sound is clearer. 6. With auto protection system, it keeps it's safety in high-volume