the smallest personal PA/monitor with built-in battery, the performance is excellent compared to the light weight and size, exceeded my expectations. Best choice for Busking. I'd say it's the best choice for any instrument or vocal when you need something really portable. Perfect delivery of bass tones, without breathlessness, I also use it as a monitor for bass guitar/double bass. I'm just sorry that there is no more option to manually control other settings without a bluetooth connection, which stopped working for me after a short time. (can't be paired) but I still don't regret the purchase. I also miss the possibility of user replacement of the battery, a stand so that he does not have to drag a tripod and have the speakers pointed at me from the ground at an angle of 45°, the battery could have a slightly longer life, and at the same time it could be USB charging of the mobile phone (2A)