The APF tv fun model 401 had a built in speaker
Developer - APF Electronics Inc
Publisher - APF Electronics Inc
Release - 1976
Platform - Model 401
Number of players - 1P / 2P
It also had two controller knobs, Toggle Switches (choices are "Professional" and "Amateur") for the following settings - Angle / Bat Size / Ball Speed. There are 2 buttons - Power and Start Game, and a dial to select between the four built-in games.
If anyone has any more information then let us know and we will add it here Contact Us from the contact page and we can add it. In particular information about the games