The MacBook Pro "Core i7" 2.5 15-Inch (Integrated Graphics/Iris Only/Force Touch - Mid-2015 Retina Display) is a "configure-to-order" version of the MacBook Pro "Core i7" 2.2 15-Inch from the same lineup, also documented as a standalone model for convenience. The only difference between these models is the processor.
It is also important to distinguish this model from the BTO/CTO MacBook Pro "Core i7" 2.5 15-Inch (Dual Graphics/Force Touch - Mid-2015 Retina Display), which is equipped with two graphics processors instead of one.
This specific MacBook Pro model incorporates a 22 nm "Haswell/Crystalwell" 2.5 GHz Intel "Core i7" processor (4870HQ), which has four independent "cores" on a single chip, a 6 MB shared level 3 cache, 16 GB of non-upgradable 1600 MHz DDR3L SDRAM, and 256 GB of PCIe-based flash storage. It utilizes an integrated Intel Iris 5200 Pro graphics processor with 128 MB of "Crystalwell" embedded DRAM. The notebook also has an integrated 720p FaceTime HD webcam and a high-resolution, LED-backlit 15.4" widescreen 2880x1800 (220 ppi) "Retina" display, all in a chassis that weighs just under 4.5 pounds (2.04 kg). It does not include an internal optical drive.
Connectivity features consist of 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.
Additionally, this model has a backlit keyboard, a new advanced "Force Touch" trackpad, a "MagSafe 2" power adapter, and a sealed internal battery with an Apple-estimated 9 hours of battery life.
Compared to its predecessor, this model is almost identical but features faster flash storage, a higher-capacity battery, and the more advanced "Force Touch" trackpad. It also comes with some different identifiers.