Product Review

Package Contents: 
1 × 7-inch touchscreen display
1 × touch pen, 8 × screws
1 × small screwdriver
2 × prop stand
1 × Standard HDMI Cable
1 × Micro HDMI to Standard HDMI Cable
1 × Micro USB Cables.
1 ×FPC Cable
1 ×PH 2.0mm-3pin connector
1 ×5V/2A Adapter
1 ×User Manual

How to use it?
Micro USB Cables：Powers the monitor when you plug it into the "5v/in " port (not needed if you use the PH connection below). Touch function when you plug it into "5v+Touch" port. 
Standard HDMI Cable: Audio and video signal transmission for device such as a TV or Pi 3 that has a standard HDMI port.
Micro HDMI to Standard HDMI Cable: Audio and video signal transmission for device that has a Micro HDMI Port, such as Raspberry Pi 4.
FPC Cable-Standard HDMI: Instead of Standard HDMI cable for Audio and video signal transmission, for example with Raspberry PI 3.
PH 2.0mm-3pin connector(black and red one): Can be used instead of the Micro USB Cable to power the monitor.

NOTE:
1: You can only choose one from Micro USB Cable and PH 2.0mm-3pin connector for power!
2: You can only choose one from HDMI Cable and FPC Cable for signal !