Nexus 9 is manufactured by HTC. It features an 8.9″ IPS LCD display with 1536 x 2048 resolution. It’s powered by an Nvidia Tegra K1 dual-core 2.3GHz processor and 2GB of RAM. Internal storage is available in either 16GB or 32GB. The Nexus 9 features a large 6700mAh battery, and 8MP camera, with 1080p video recording, along with a 2.1MP secondary front facing camera.
Google has uploaded the factory image of Nexus 9 on its developer website. Using this image, Nexus 9 can be updated to Android 6.0.1 Marshmallow without having to wait for the OTA. If you are interested in installing it manually, a detailed guide is given below.