No sound. Powered on with batteries. The power lamp turns on and then turns off after about 3-4 seconds, which seems to be the specification (apparently only when using batteries). The jack on my adapter doesn't fit, so I haven't confirmed operation with an adapter. The screws for the back cover are missing. For packaging purposes, the back cover will be packed separately. Of course, the back cover is included. There are scratches and dirt. This is a junk item.