821-1748-A NB-1549W
This is the microphone with cable for the MacBook 13" Unibody.
Apple part number: 922-8619, 821-1748-A
Compatible models: Unibody-A1278, Unibody-A1278, MB466LL/A, MB467LL/A, 821-1748-A
Compatible Mac info. : 2.0GHz Core 2 Duo 13-inch Macbook , 2.4GHz Core 2 Duo 13-inch MacBook 821-1748-A
922-8619 Microphone Cable - Late 2008 Macbook Aluminum 2-2.4GHz A1278 8211748A