do you read me?
Do you understand me? For example, I'm sick of all these meetings—do you read me? This phrase originally applied to messages received by radio or telephone. [c. 1930]
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.