ViewSonic M1 Portable Projector with Dual Harman Kardon Speakers HDMI USB Type C Automatic Vertical Keystone and Built-in Battery
https://diigo.com/0ga6ua
Viewsonic Mini Projector M1 Led - the Story As you will rarely apply your projector anywhere that doesn't have a power outlet, it's inconvenient to need to tailor your use around the length of time the battery