ARZOPA Z3FC - 16.1 Inch 2560 x 1440 Pixels

Regarding power supply: This device does not have its own battery and cannot supply power independently (most portable displays are like this)If your output device can only output video signals through the HDMI interface, the portable monitor must require additional power supply via the Type-C port.If your output device can simultaneously output video signals and supply power through the C port, generally speaking, additional C port power supply is not required. Unless, the power supply of your C port is insufficient (manifested as screen flickering or abnormal display), in which case additional C port power supply is still necessary. Regarding the external sound volume of the monitor: Due to the overall thin and light design, and in order to achieve a higher screen-to-body ratio, the monitor itself has speakers, but the playback effect is only intended to meet basic functions.