Targus has released a set of USB Type-C Display Port Alternate Mode Adaptors compatible with Thunderbolt 3 ports. All three provide video to an external monitor when connected to either USB Type-C Thunderbolt or DisplayPort Alternate Mode host ports. (They do not provide another monitor connection on USB 3.0 Type-A or USB SuperSpeed Type-C ports, nor do they provide Type-C Power Delivery or PD Pass Through.)
- The ACA932 provides up to 4K2K at 30Hz video to a DisplayPort 1.2 monitor port.
- The ACA933 provides up to 4K2K at 30Hz video to an HDMI 2.0 monitor port.
- The ACA934 provide up to 2048×1152 at 60Hz to a VGA monitor port.
These adapters can be used for a third or even fourth display monitor output if the host’s graphics support the multiple streams. For instance, using the 2016 MacBook with Lightbar, the DocKtor rendered 4K2K @ 30Hz using the DOCK410 on one TB3 port, 2560×1600 @ 60Hz using the ACA932 on another TB3 port, and 2048×1152 @ 60Hz using the ACA934 on a third MacBook TB3 port, and while the internal monitor was also rendering at full default resolution and speed.
Type-C host/device compatibility varies widely, so be sure to try it before you buy it.