CR 8700 Memory Expansion Combo Kit provides two interfaces to access microSD card memory (USB 2.0 or microSD to SD adapters). Adapters maintain Apple form factor with flawlessly concealed designs offering a seamless user experience. Replaces the need for costly memory upgrades direct from manufacturer (microSD card not included in combo kit). Compatibility is product specific for the following: Apple MacBook Air 13", Apple MacBook Pro 13"/15", Apple MacBook Pro Retina 15".