For your consideration, here is a Staples That Was Easy Talking Desk Push Button, made in China.  It has very little wear on it.  The sound is clear.  The battery compartment is clean.  It has a diameter of 3 1/2 inches.  It will be mailed in a box for protection.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (428.303o-.8bs)