1. Operating system: No operating system, runs immediately upon power on, 485 interface, FPGA pure hardware display driver

2. Total volume adjustment, input/output volume adjustment for each channel, archive call function (86 boxes)

3. Size: 3.5 inches

4. Resolution: 240 * 240

5. Color: 64K color, 16 bit RGB

6. Voltage: 5-26V

7. Communication interface: RS485

8. Effective screen display size: length * width=69 * 51.5mm

Product dimensions: length * width * height=86 * 86 * 27.5mm