He pressed the transmit key on his mike.

He let go of the transmit key.

He finished the message and pressed the transmit key.

His answer was a double click of static as the captain keyed the transmit key on his radio, but without saying anything.

The captain tapped out four dashes on the transmit key of his radio and got two signals back.

Sam leaned forward to the audio pickup and thumbed the transmit key.

He held the mike to his mouth, pressing the transmit key.

Croft called, fiercely depressing the transmit key on his microphone.

She grabbed the small survival radio clipped to her flight suit, pressing the transmit key.

He touched the transmit key on the Search and Rescue radio strapped to his flight suit.