Specification: Product Name: Magnetic Selfie Monitor Screen Colour: Black, grey Input:5V=1A Rated power: 1.75w Battery capacity: 3.7v 1500mAh power Input port: USB-C video connection port: USB-C screen size: 3.97 Inches screen Resolution: 480x800pixels proeuct size: 101*61*11mm productweight: 92g Description: 1.Wireless screen projection/magnetic quick installation/high-definition picture quality/adjustable screen 2. The horizontal rotation button on the screen can quickly flip the screen image without repeatedly disassembling the display screen 3. Screen brightness can be adjusted: Clicking the brightness adjustment button allows for four levels of brightness adjustment 4. Screen aspect ratio switching: Click the aspect ratio adjustment button to switch between full-screen mode and 1:1 mode 5. The handheld display screen allows you to view your status in front of the camera in real time, and you can also take selfies from a distance alone