After a few days of use, the sound quality is OK. The wattage is low, but the 6O wattage is better. The volume is a little low, and the carrying strap is lost. I just received it today. The black strap is yellow, which does not match the tone, and it is not beautiful. The plastic of the strap is aging fast. It is estimated that it will be used for one to two years. The design of the carrying handle is poor.