Compatible Replacement I/O AUDIO USB BOARD CABLE MacBook Air 11" A1370 Late 2010, mid 2011 821-1340-a A1370 I/O Board Cable Late 2010 821-1340-A. Compatibility: - MacBook Air 11" A1370 - MacBookAir3,1 Late 2010: MC505LL/A (1.4 GHz Core 2 Duo) - MacBookAir3,1 Late 2010: MC506LL/A (1.4 GHz Core 2 Duo) - MacBookAir3,1 Late 2010: MC506LL/A BTO (1.6 GHz Core 2 Duo) - MacBookAir4,1 Mid 2011: MC968LL/A (1.6 GHz Core i5) - MacBookAir4,1 Mid 2011: MC969LL/A (1.6 GHz Core i5) - MacBookAir4,1 Mid 2011: MC969LL/A BTO (1.8 GHz Core i7) Professional Technical Installation highly recommended What's in the box 1X I/O BOARD CABLE