According to my experience it is not good for long term . If it falls 3-4 times then after that it’s sound gets disturbed as it happened with me. It have been approx 1 and half year I am using it .
But now it gives bad performance. So I do not recommend this. In the beginning it was awesome .
This is available in a case where it needs to be charged. After 4-5 hours of charging, it gives 24 hours backup.
USB is provided for charging, you can use the adapter on your phone.