Lenovo USB-C To HDMI Adapter $34.99 with one year warranty. Lenovo Miix 510 use this for external display or for larger screen.

The Lenovo USB-C to HDMI Adapter turns an available USB-C port into an HDMI 1.4 compliant output, with high resolution video support and audio.The Lenovo USB-C to HDMI Adapter can be used to mirror your primary display or to extend your display to double your workspace requiring no extra drivers to be installed. Features:USB-C to HDMI conversion delivers high-quality video and audio through a single HDMI cable, from system to displayLightweight, portable.

Apple Lightning Digital AV Adapter RM 229.00 It also outputs video content — movies, TV shows, captured video — to your big screen in up to 1080p HD. Simply attach the Lightning Digital AV Adapter to the Lightning connector on your device and then to your TV or projector via an HDMI cable (sold separately).

Have Problem with LENOVO MIIX 510 when connect usb type-C to HDMI adapter. I purchased two different brands of USB 3 Type to HDMI adapters. Neither of them worked using different TV's and different length HDMI cables. I finally had success when I purchased a 3m 4K super duper gold HDMI cable to connect the USB 3 Type C adapter to the TV(s).

Note that this would only work on SOME TV's. DO NOT try to use a long HDMI cable. That surely won't work. Extremely frustrating. There must be some kind of lack of power output.