STARTECH.COM ST DP2HD4KS - Active adapter DisplayPort 1.2 male > HDMI female, 4K

Connect an HDMI monitor to a DisplayPort video source.
The DP2HD4KS DisplayPort to HDMI adapter enables you to connect a DisplayPort-equipped desktop or laptop computer, such as the HP EliteBook 8570p / 8470p, to an HDMI display. This adapter is compatible with DisplayPort 1.2 & HDMI 4K @ 30 Hz and as a result can support video resolutions up to Ultra HD (4K) as well as the accompanying digital audio up to 7.1 channel surround sound.

With support for resolutions up to Ultra HD (4K) the DP to HDMI adapter ensures you can convert DisplayPort to HDMI while maintaining an astonishing picture quality four times the resolution of high-definition 1080p. The adapter is also backward compatible with previous DisplayPort revisions 1.0/1.1 with support for resolutions up to 1080p.

Hardware
Active or Passive Adapter: Active
Adapter Style: Adapter
Audio: Yes
Converter Type: Format Converter
Industry Standards: DPCP (DisplayPort Content Protection), HDCP (High Definition Content Protection), DisplayPort 1.2, HDMI 1.4
Ports: 1

Connector(s)
Connector A: 1 - DisplayPort (20 pin) Male
Connector B: 1 - HDMI (19 pin) Female ...