Have the part not here, but ordered from the same provider E .... The delivery was very quick. Arrived, unpacked and immediately tested all possible sources (except for I-Pod and SD slot). Everything great. The battery was charged, and ran the part and ran and ran ..... The volume and sonority I find very good. The equalizer can compensate for a lot, if the source is not twice as good. The supplied wireless microphone works great with echo and separate volume and tone controls. One thing is quite clear is 100 watts that are possible there. So certainly not for big parties in the professional sector. For a large family or friends acquaintances Party sufficient. For the price just great. I can recommend the part and the seller.