PI8043ig HMI CPU A35, 4GB Flash, 512M DDRAM. Display:4.3 inches; Resolution: 480*272. Interfaces: a serial port. COM1: RS232, RS422 or RS485(choose one of two), RS485. USB interfaces:USB2.0 Host or USB2.0 Type-C(Can not use at the same time). Remote monitoring and WVPN pass-through download. supports related functions of V-NET, Ethernet pass-through download and sync data to cloud.