Apple Macbookpro A1398 15

Screen Size: 15.4-inch (diagonal) LED-backlit display with IPS technology. Native Resolution: 2880 x 1800 pixels (Retina display) at 220 pixels per inch (ppi). Brightness & Contrast: 300 nits brightness, 900:1 contrast ratio. Supported Scaled Resolutions: 1920×1200, 1680×1050, 1440×900, and 1024×640 pixels. ⚙️ Processor & Memory Processor (CPU): 2.2 GHz Quad-Core Intel Core i7 (Crystalwell / Haswell architecture, Intel i7-4770HQ). Turbo Boost: Up to 3.4 GHz . Cache: 6MB shared L3 cache. [ Memory (RAM): 16GB of 1600MHz DDR3L onboard memory ( Note: The RAM is soldered onto the logic board and cannot be upgraded post-purchase ). [ 💾 Storage & Graphics Storage: 256GB PCIe-based flash storage (SSD) . Upgradability: Removable proprietary PCIe blade SSD ( can be upgraded via third-party aftermarket drives ). Graphics (GPU): Intel Iris Pro 5200 Graphics . Uses up to 1.5GB of shared system memory along with 128MB of embedded DRAM (eDRAM) for enhanced graphical bandwidth. Supports dual display and video mirroring (simultaneously driving native resolution and up to two external displays at up to 3840×2160 pixels via Thunderbolt). 🔌 Ports & Expansion This generation is famous for its abundant array of legacy ports Power: MagSafe 2 power port. Thunderbolt: Two Thunderbolt 2 ports (up to 20 Gbps). USB: Two USB 3.0 ports (up to 5 Gbps). Video Output: One HDMI port . Audio: 3.5mm headphone jack. Card Slot: SDXC card slot. 🔋 Battery & Power Battery Type: Built-in 99.5-watt-hour lithium-polymer battery. Battery Life: Up to 9 hours of wireless web browsing or iTunes movie playback. Power Supply: 85W MagSafe 2 Power Adapter with cable management system. [ 🌐 Wireless & Multimedia Wi-Fi: 802.11ac Wi-Fi wireless networking (IEEE 802.11a/b/g/n compatible). Bluetooth: Bluetooth 4.0 or 4.2 wireless technology. Camera: 720p FaceTime HD camera. Audio: Stereo speakers with high dynamic range, dual microphones, and support for Apple iPhone headset with remote and microphone. Keyboard & Trackpad: Full-size backlit keyboard and a Force Touch trackpad that provides haptic feedback and pressure-sensitive cursor control. [