Vintage Radio Dial Acrylic Wall Clock for Ham Shacks. Give your radio room a little bit of class. Each clock has a keyhole at the back for easy hanging on a wall. They're made from an acrylic material that looks like glass but is more durable and sturdy. .: Material: 100% acrylic .: Round and square shape options .: Size 10.75''×10.75'' .: Requires one AA battery (NOT included) .: Includes keyhole hanging slot