UNO-220-P4N1AE_DESCRIPTION.html
Featuring a system-image OS equipped micro SD card, an RPi 4 HAT I/O board, additional RS-232/485 GPIOs, and an RTC battery backup for precise time keeping; UNO-220 is designed for customers using Raspberry Pi 4 (RPi 4) single-board computers (SBCs) in IoT applications.