• Hard Drive: 500GB, 5400-RPM
• Processor / RAM: 2.5GHz dual-core Intel Core i5 processor (Turbo Boost up to 3.1GHz) with 3MB L3 cache, 4GB
• Display / Video: 13.3” (diagonal) LED-backlit glossy widescreen display, 1280 by 800 (native)
• Graphics: Intel HD Graphics 4000
• Connection & Expansion: MagSafe power port, Gigabit Ethernet port, FireWire 800 port (up to 800 Mbps), Two USB 3 ports (up to 5 Gbps), Thunderbolt port (up to 10 Gbps), Audio line in/out, SDXC card slot, Kensington lock slot
• Wireless: 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible, Bluetooth 4.0 wireless technology
• Battery/Power: 60W MagSafe Power Adapter with cable management system; MagSafe power port

• Hard Drive: 750GB, 5400-RPM
• Processor / RAM: 2.9GHz dual-core Intel Core i7 processor (Turbo Boost up to 3.1GHz) with 3MB L3 cache, 8GB
• Display / Video: 13.3” (diagonal) LED-backlit glossy widescreen display, 1280 by 800 (native)
• Graphics: Intel HD Graphics 4000
• Connection & Expansion: MagSafe power port, Gigabit Ethernet port, FireWire 800 port (up to 800 Mbps), Two USB 3 ports (up to 5 Gbps), Thunderbolt port (up to 10 Gbps), Audio line in/out, SDXC card slot, Kensington lock slot
• Wireless: 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible, Bluetooth 4.0 wireless technology
• Battery/Power: 60W MagSafe Power Adapter with cable management system; MagSafe power port

• Hard Drive: 128GB flash storage                              
• Processor / RAM: 2.5GHz dual-core Intel Core i5 processor (8GB RAM)
• Display / Video: Retina Display; 13.3” (diagonal) LED-backlit display w/ IPS technology; 2560-by-1600 resolution at 227 pixels per inch
• Graphics: Intel HD Graphics 4000, dual display & video mirroring
• Connection & Expansion: MagSafe 2 power port, Two Thunderbolt ports (up to 10 Gbps), Two USB 3 ports (up to 5 Gbps), HDMI port, Headphone port, SDXC card slot, Apple Thunderbolt to Gigabit Ethernet Adapter (sold separately)
• Wireless: 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible
• Battery/Power: 60W MagSafe 2 Power Adapter with cable management system; MagSafe 2 power port

• Hard Drive: 256GB flash storage                              
• Processor / RAM: 2.6GHz dual-core Intel Core i5 processor (8GB RAM)
• Display / Video: Retina Display; 13.3” (diagonal) LED-backlit display w/ IPS technology; 2560-by-1600 resolution at 227 pixels per inch
• Graphics : Intel HD Graphics 4000, dual display & video mirroring
• Connection & Expansion: MagSafe 2 power port, Two Thunderbolt ports (up to 10 Gbps), Two USB 3 ports (up to 5 Gbps), HDMI port, Headphone port, SDXC card slot, Apple Thunderbolt to Gigabit Ethernet Adapter (sold separately)
• Wireless: 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible
• Battery/Power: 60W MagSafe 2 Power Adapter with cable management system; MagSafe 2 power port

• Hard Drive: 500GB, 5400-RPM
• Processor / RAM: 2.3GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.3GHz) with 6MB L3 cache, 4GB
• Display / Video: 15.4” (diagonal) LED-backlit glossy, 1440 by 900 (native)
• Graphics: Intel HD Graphics 4000, NVIDIA GeForce GT 650M with 512MB of GDDR5 memory, automatic graphics switching
• Connection & Expansion: MagSafe power port, Gigabit Ethernet port, FireWire 800 port (up to 800 Mbps), Two USB 3 ports (up to Gbps), Thunderbolt port (up to 10 Gbps), Audio line in/out, SDXC card slot, Kensington lock slot
• Wireless: 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible, Bluetooth 4.0 wireless technology
• Battery/Power: 85W MagSafe Power Adapter with cable management system; MagSafe power port
   

• Hard Drive: 750GB, 5400-RPM
• Processor / RAM: 2.6GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.6GHz) with 6MB L3 cache, 8GB
• Display / Video: 15.4” (diagonal) LED-backlit glossy, 1440 by 900 (native)
• Graphics: Intel HD Graphics 4000, NVIDIA GeForce GT 650M with 512MB of GDDR5 memory, automatic graphics switching
• Connection & Expansion: MagSafe power port, Gigabit Ethernet port, FireWire 800 port (up to 800 Mbps), Two USB 3 ports (up to Gbps), Thunderbolt port (up to 10 Gbps), Audio line in/out, SDXC card slot, Kensington lock slot
• Wireless: 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible, Bluetooth 4.0 wireless technology
• Battery/Power: 85W MagSafe Power Adapter with cable management system; MagSafe power port
   

• Hard Drive: 256GB flash storage                              
• Processor / RAM: 2.4GHz quad-core Intel Core i7 processor (8GB RAM)
• Display / Video: Retina Display; 15.4” (diagonal) LED-backlit display w/ IPS technology; 2880-by-1800 resolution at 220 pixels per inch
• Graphics: Intel HD Graphics 4000, NVIDIA GeForce GT 650M with 1GB of GDDR5 memory & automatic graphics switching, dual display & video mirroring
• Connection & Expansion: MagSafe 2 power port, Two Thunderbolt ports (up to 10 Gbps), Two USB 3 ports (up to 5 Gbps), HDMI port, Headphone port, SDXC card slot, Apple Thunderbolt to Gigabit Ethernet Adapter (sold separately)
• Wireless: 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible
• Battery/Power: 85W MagSafe 2 Power Adapter with cable management system; MagSafe 2 power por
   

• Hard Drive: 512GB flash storage                              
• Processor / RAM: 2.7GHz quad-core Intel Core i7 processor (16GB RAM)
• Display / Video: Retina Display; 15.4” (diagonal) LED-backlit display w/ IPS technology; 2880-by-1800 resolution at 220 pixels per inch
• Graphics: Intel HD Graphics 4000, NVIDIA GeForce GT 650M with 1GB of GDDR5 memory & automatic graphics switching, dual display & video mirroring
• Connection & Expansion: MagSafe 2 power port, Two Thunderbolt ports (up to 10 Gbps), Two USB 3 ports (up to 5 Gbps), HDMI port, Headphone port, SDXC card slot, Apple Thunderbolt to Gigabit Ethernet Adapter (sold separately)
• Wireless: 802.11n Wi-Fi wireless networking; IEEE 802.11a/b/g compatible
• Battery/Power: 85W MagSafe 2 Power Adapter with cable management system; MagSafe 2 power port
• 
  updated March 18, 2013

Apple's Spec Sheet: MacBook Pro