The 12.9-inch iPad Pro was powered by an Apple A9X processor and had 4 GB of RAM; 32, 128, or 256 GB of storage; a rear-mounted 8 megapixel iSight camera (1080p); a front-mounted 1.2 megapixel FaceTime HD camera (720p); 802.11a/b/g/n/ac Wi-Fi; Bluetooth 4.2; dual microphones; two sets of stereo speakers; and a Lightning port. The screen was a 12.9-inch TFT touch-sensitive Retina display with 5.6 million pixels (2732×2048 at 264 ppi) and included an antireflective coating. A cellular-equipped model was also available.
The 12.9-inch iPad Pro was available in silver with a white front, gold with a white front, and space gray with a black front. This model is space gray.
This iPad Pro included a new Smart Connector that provided connectivity and power for the Apple Smart Keyboard.
The Apple Pencil was announced with this first-generation iPad Pro on September 9, 2015. The Pencil could be used with the first and second generation iPad Pro models. It connected wirelessly using Bluetooth and had a removable cap that concealed a Lightning connector for charging. It used pressure sensitivity and angle detection and had very low latency, making it function like a real pencil with no delay.
Sources: EveryMac.com, Wikipedia.com