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Your computer is already equipped. You need a third party adapter something like this:<br />
<br />
<a href="https://www.monoprice.com/pages/usb_31_type_c" rel="ugc">https://www.monoprice.com/pages/usb_31_type_c</a>
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<a href="https://www.amazon.co.uk/gp/product/B01FIVSC6Y/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1" rel="ugc">https://www.amazon.co.uk/gp/product/B01FIVSC6Y/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1</a><br />
<br />
Cost: £21.95<br />
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The one above will work for you.<br />
<br />
Source: <a href="https://forums.lenovo.com/t5/Lenovo-Yoga-Series-Notebooks/Yoga-910-13IKB-external-4K-monitor-with-USB-C-to-USB-C/m-p/3500793#M45940" rel="ugc">https://forums.lenovo.com/t5/Lenovo-Yoga-Series-Notebooks/Yoga-910-13IKB-external-4K-monitor-with-USB-C-to-USB-C/m-p/3500793#M45940</a>
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<div class="content wysiwyg-content">
<a href="https://www3.lenovo.com/gb/en/laptops/yoga/900-series/Lenovo-Yoga-910-13IKB/p/88YG9000786" rel="ugc">https://www3.lenovo.com/gb/en/laptops/yoga/900-series/Lenovo-Yoga-910-13IKB/p/88YG9000786</a>
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https://www3.lenovo.com/gb/en/laptops/yoga/900-series/Lenovo-Yoga-910-13IKB/p/88YG9000786

Lenovo Yoga - What usb adapter do I need for ext video ?

A laptop or notebook is a portable personal computer with a clamshell form factor, suitable for mobile use. Although originally there was a distinction between laptops and notebooks, the former being bigger and heavier than the latter, there is often no longer any difference. Laptops are commonly used in a variety of settings, such as at work, in education, and for personal multimedia. A laptop combines the components, inputs, outputs and capabilities of a desktop computer, including the display screen, speakers, a keyboard, and pointing devices (such as a touchpad or trackpad) into a single unit. The device can be powered either from a rechargeable battery or by mains electricity from an AC adapter.