Condition:
Original, Pre-owned, pulled from working Mac
Tested working 100% Fully Functional

Specifications:
Onboard CPU: 2.5 GHz, (Turbo Boost 3.3 GHz), Core i5 64-bit
Onboard GPU: Intel HD 4000,
VRAM: 512M ~ 768M*
RAM: 4GB ~ 16GB (Max.) Supports 1333 MHz PC3-10600 DDR3 SDRAM.
Connectivities: WiFi: 802.11a/b/g/n (450 Mbit*) Bluetooth: 2.1+EDR
Ports: USBX2 (2.0), SDXC Card Slot.

Identifying Numbers:
Apple Part #: 661-6588
Printed Part #: 820-3115-A, 820-3115-B

Compatibility:
For MacBook Pro 13″ A1278
For MacBookPro A1278 Mid 2011: MD101LL/A (2.5 GHz Core i5)
For MacBookPro A1278 Mid 2012: MD102LL/A (2.9 GHz Core i7)

Warranty:
3 Months from the date of purchase