Simplify connections to USB-C devices. The Marble DCS1 USB-C dock provides simple connections and charging for USB-C devices as well as an HDMI output to provide video to NEC display devices. The USB-C charging functionality supports up to 65W of charging, enough for most USB-C devices. The HDMI connection can deliver clear digital video at native resolution for most desktop displays. 2-in-1 USB-C docking & charging station that expands USB-C to HDMI, USB-A 3.0, microSD & charge up to 4 devices simultaneously Built-in 65w AC adapter. Supports input voltage range 100-240V, 1.4 A, 50/60 Hz. Compatible with 12-inch MacBook, 13 in New MacBook Pro Standard and TouchBar). NOT compatible with 15 inch New MacBook Pro charging, but can still be used as hub and dock HDMI Type-A supports monitor resolution: 1080p/60Hz, 1920x1200/60Hz, 2560 x 1440/60Hz or 3840x2160(UHD )/30Hz USB-C 3.0 & USB-A 3.0 Ports. Max. power output 12W. Supports 5W/2.4A, 5V/2.1A and 5V/1A charging. MicroSD reader: max data transfer speed: 400 Mb-500Mb/s.