Apple Pencil (original, 2015)

The original Apple Pencil was released along with the original iPad Pro in September 2015. The Apple Pencil can be used by the iPad Air (Generation 3), iPad mini (Generation 5), iPad Pro 10.5-inch, iPad (Generation 6 and 7), iPad Pro 12.9-inch (Generation 1 and 2), and iPad Pro 9.7-inch. It pairs to an iPad device using Bluetooth, and has a removable magnetically attached cap hiding a Lightning connector.

The original Apple Pencil somewhat awkwardly charges by plugging it into the lightning port of an Apple device; however, it also includes a female-to-female adapter that allows charging with a Lightning cable. While a full charge can last up to 12 hours, a 15-second charge provides about 30 minutes of use.

The Apple Pencil can be used for writing, drawing, or annotating in a wide variety of apps. Apple describes its features as having “pixel-perfect precision, tilt and pressure sensitivity, and imperceptible lag.”

Source: Wikipedia, Apple (description, specifications)

iPad Pro (12.9-inch, Wi-Fi, 2015) with Smart Keyboard for the 12.9-inch iPad Pro (2015) and Apple Pencil (original, 2015)

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