Microsoft has kicked off pre-orders for the HP Elite x3 Lap Dock. The device is now listed on the company's US website for $599, and will start shipping November 14 onwards. The HP Elite x3 Lap Dock is basically a 12.5-inch diagonal display notebook form factor that wirelessly connects with the Windows 10-powered phone to offer a laptop-like experience. It also includes a micro HDMI connector, two USB-C ports, and a 46.5 WHr battery. Source
Source: http://www.gsmarena.com/microsoft_starts_taking_preorders_for_hp_elite_x3_lap_dock-news-21019.php
