4k portable monitor touchscreen, uperfect gravity sensor automatic rotate 15.6'' slimmest 10-point touch uhd 3840x2160 dual usb c monitor bracket integrated & frameless bezel glass hd laptop display uperfect q: how to get the touch function? a: no need driver, just connect the usb c port of the monitor to your device to achieve the touch function. note: all gaming device and mobile phone without full featured type c function can not get touch function. q: why should i connect to power supply with pd power adapter when using the monitor? a: as this model is 4k touchscreen with special bracket integrated design, it needs larger power input to keep working. so it must connect to power supply with our pd power adapter and compatible device at the same time, otherwise, it will enter standby mode(black screen) automatically. q: how is the gravity sensor automatic rotation work? a: when connected to your device, the monitor will sense product direction automatically, and automatically switched display into horizontally or vertically according to the product's position, as the monitor usually take around 3s to sense product direction, so please do not rotate the monitor frequently. and it can only rotate 90 degrees at a time. if it does not rotate correctly, please reset the rotation on the touch menu.