Unit is tested and works but volume button does not work, the volume is turned up a good amount and can hear the music with headphones on but volume button does not change volume, also do not think the “sound” button works because nothing happens when I press it, the battery compartment has some corrosion, I cleaned some out but there is still a visible amount. Rechargeable energizer batteries worked when I first tested it but wouldn’t work the second time, but normal AA batteries worked 3 separate times I tested. Not sure if it’s the corrosion causing that. Sold as is for parts or repair. Ships same or next day after payment, thanks for looking !