1) up to 5-points touch, depending on the operating system.
* audio output via earphone/speaker port.
Demystifying Design Details
LCD FFC cable anti-interference design, more stable for industrial application
VCOM voltage adjustment for optimizing display effect
USB protocol translator, converting the touch signal into standard multi-points touch protocol to achieve smooth multi-points touch control
4~5.5V wide range USB power input, to avoid display flickering or touch failure that caused by low USB voltage
One-way isolation circuit. When powered from Touch port, the 5V voltage from Touch port will provide power supply for both touch function and display circuit. When powered from Power Only port, the Touch port will provide power supply for just touch function, and the other circuit will be powered via Power Only port. The two power inputs are totally isolated to prevent any breakdown
Two audio outputs for earphone and speaker, each track of speaker supports 2.6W PA circuit
OSD menu config buttons for adjusting backlight and display color
DC-DC LCD driver circuit, low heating on long term operation