Adapter SBOX USB C - PD + TYPE C + HDMI + TF + SD + 2 x USB SS It is an 7in1 adapter which connects to host device by USB Type C cable(compatible with Thunderbolt 3). With this adapter you get HDMI output with 4K video support for you projector or some another compatible device, 2 X USB SS ports, 2 X USB TYPE C ports - one of these ports is used like additional power (power supply NOT INCLUDED IN PACKAGING), and SD/TF card reader. Specifications: HDMI - 4K*2K(3840 x 2160), compatible with 1080P, 720P USB - 2 x USB, power supply up to 4.5W Max USB C Port no. 1 female - PD, 20V, 3A, Supports Max 87W Power adapter (Input) USB C Port no. 2 female - USB C power supply 4.5W Max USB C Port male - Compatible with thunderbolt 3, make sure that host USB-C port on your device complies with 3.0/3.1 SD/TF card reader - can work simultaneously, read and write speed depends on card.