StarTech.com USB C Multiport Video Adapter, 4K 60Hz USB-C to HDMI 2.0 or DisplayPort 1.2 Monitor Adapter, USB Type-C 2-in-1 Display Converter HDMI/DP HBR2 HDR, Thunderbolt 3 Compatible | www.publicsector.shidirect.com
Amazon.co.jp: Plugable DisplayPort to HDMI Converter Adapter, Active HDMI 2.0 Compatible with DisplayPort Port System Support 4K@60Hz : Computers
Tripp Lite P136-06N-UHD-V2 Adapter, DisplayPort to HDMI 4K Active Video Converter, DP ver 1.2, HDCP, 4K 30Hz (M/F), 6" (152 mm)