Passive Phone Speaker

This is a simple passive phone speaker. I made it to where it would accept my Otter Box Cover for my Android S22 and my wife's I-Phone 17 Cover which is thick. I believe it should work for most phones, but I have not bothered taking measurements of any phones or covers . The opening might allow for a little sound to escape out the sides and does not provide a tight fit. I think this really does work well and I think it will work well when you just want a little extra without having to break out the Bluetooth speaker. It also doubles as a phone holder.