We have after a long search we decided for the Mobile PA sound system 900 W of E Lektron and no regrets. We bought for New Year 2013, the plant. We have a 50 m2 large room with about 60 guests sonicated a complete success. We have the box with i phone and i pad operated and using the house current. How long does the battery now, is not an option for us. Good to know that when the Stromausfällt, the music still runs. There is also a lot on the network to the superior, and how you can extend the duration of the music by other batteries. Using the 2 Aux inputs on the speaker you can also music from these devices (i phone, i pad, etc) listening. That was our only not so clear. The design of the i pad, i phone and the corresponding dj app comes from the Lucy. We have previously USB or memory card is not inserted. Is also not at all further planned. The Microphone fulfill the purpose and were used actively to sing cool songs. A big thanks for the uncomplicated delivery of goods so shortly before the final whistle. Even after the goods ordering process we decided on another delivery of goods and we were not disappointed by the logistics provider. Even the given delivery date has been exceeded. (21:12. Ordered, 23:12. The aim should therefore already of 29.12. Be ..) Thank you !! The box gets a strong buy recommendation! In addition, I recommend a Auxkabel with two outputs, as can be designed more and two 1m long Auxkabel for the corresponding audio store .... For you out there: Have fun people beschallen :)