This is a 7 in 1 adapter that connects to the host device by USB Type C cable
With this adapter you get an HDMI output with 4K video support for your projector or other compatible device, 2 x USB SS, 2 x USB Type-C ports - one of these ports is used as an extra power supply (power not included in the package) and an SD/TF card reader.
HDMI: 4K x 2K (3840 x 2160), compatible with 1080p, 720p
USB: 2 x USB, power up to 4.5W max
#1 Female USB C Port - PD, 20V, 3A, Supports Max 87W Power Adapter (Input) - USB C Port No. 2 Female - USB C Power Supply 4.5W Max USB C Male Port - Compatible with Thunderbolt 3, Make sure your device's host USB-C port complies with standard 3.0/3.1
SD/TF card reader - can work simultaneously, read and write speed depends on the card.