I had this in my gaming room, but I barely used it. You can change the messages yourself. The number of each alphabet letter varies. There are plenty of vowels. I don't think any are missing, but please refrain from purchasing if you are concerned. It has slots for 6 batteries, but for some reason, it lights up with 3. Batteries will be removed before shipping. Operation confirmed. I will wrap it in bubble wrap and ship it securely and safely via Mercari delivery.