Apple MacBook Pro 15-Inch "Core i7" 2.8 Mid-2015 (DG)
Identifiers: Retina Mid-2015 15" - MJLU2LL/A - MacBookPro11,5 - A1398 - 2910
Introduction Date: May 19, 2015 Discontinued Date: October 27, 2016

The MacBook Pro "Core i7" 2.8 15-Inch (Dual Graphics/Force Touch - Mid-2015 Retina Display) originally was only available as a "configure-to-order" configuration of the MacBook Pro "Core i7" 2.5 15-Inch (Dual Graphics/Force Touch - Mid-2015 Retina Display), but Apple later added it as a standard option, as well.

The MacBook Pro "Core i7" 2.8 15-Inch 
(Dual Graphics/Force Touch - Mid-2015 Retina Display) features 
a 22 nm "Haswell/Crystalwell" 2.8 GHz Intel "Core i7" processor (4980HQ), 
with four independent processor "cores" on a single silicon chip, 
a 6 MB shared level 3 cache, 
16 GB of onboard 1600 MHz DDR3L SDRAM (which cannot be upgraded later), 
256 GB of PCIe-based flash storage, and 
dual graphics processors 
-- an AMD Radeon R9 M370X with 2 GB of dedicated GDDR5 memory and 
-- an integrated Intel Iris 5200 Pro graphics processor with 128 MB of "Crystalwell" embedded DRAM (and shared system memory). 

It also has an integrated 720p FaceTime HD webcam and 
a high-resolution LED-backlit 15.4" widescreen 
2880x1800 (220 ppi) "Retina" display in 
a case that weighs just less than 4.5 pounds (2.04 kg). 

It does not have an internal optical drive.

Connectivity 
includes 802.11ac Wi-Fi, 
Bluetooth 4.0, 
two USB 3.0 ports, 
two "Thunderbolt 2" ports, 
an HDMI port, 
an audio in/out port, 
and an SDXC card slot.

In addition, this model has 
a backlit keyboard, 
a new advanced "Force Touch" trackpad, 
a "MagSafe 2" power adapter, and 
an internal, sealed battery.

Compared to its predecessor, this model is similar, but it has a faster graphics processor, faster flash storage, a higher capacity battery, and a more advanced "Force Touch" trackpad. It has some different identifiers, too.

Please note that stock images are used.