W630 2 LAN Port Serial to WiFi Converter 2 LAN Port Serial to WiFi Converter W610 1 LAN Port Serial to WiFi Converter 1 LAN Port Serial to WiFi Converter WIFI232-B2 Embedded WiFi Modules（External） Embedded WiFi Modules（External） WIFI232-A2 Embedded WiFi Modules（built-in） Embedded WiFi Modules（built-in） WIFI232-630 Modbus RTU to WiFi Converter Modbus RTU to Modbus TCP. WIFI232-602-V2 RS232 WiFi Converter SMS Transparent Transmission WIFI232-610-V2 Serial WIFI Converter 2G GSM GPRS. WIFI232-604-V2 RS485 Wifi Converter RS232 or RS485 Port.