1、Made of high quality material, MIPS MCU with 4MB flash memory and 8MB SRAM can run on for eCos 2、The RS485 to WIFI serial server can support TCP / UDP / MQTT / HTTP / WebSocket protocol 3、Support RS485 to Ethernet/Wi‑Fi conversion, the serial speed can be up to 230400 bps 4、Support STA / AP / AP + STA mode and router or bridge network working mode 5、Support TLS/AES/DES3 and other security protocols and Web OTA wireless upgrade 6、Support easy configuration via web interface or PC IOTService tool, support 10/100M Ethernet auto‑negotiation 1 x Server1 x Antenna1 x English User Manual Item Type: RS485 to WIFI Serial ServerModel: PW21-MInput Voltage: 9-50VDCPower: 10WProcessor/Frequency: For MIPS/320MHzFlash/SDRAM: 4MB/8MBOperating System: For ECosEthernet Port: Port Number: 1 RJ45, 1 WAN / LAN switchableInterface Standard: 10/100 Base-T auto-negotiationProtection: 8KV isolationTransformer Integration: Network Protocol: IP, TCP, UDP, DHCP, DNS, HTTP server/client, ARP, BOOTP, AutoIP, ICMP, Web socket, Telnet, uPNP, NTPSecurity Protocol: TLS v 1.2 AES 128 bit DES3Wi-Fi Interface: Standard: 802.11 b / g / nFrequency: 2.412GHz- 2.484GHzNetwork Mode: STA / AP / STA + APSecurity: WEP / WPAPSK / WPA2PSKEncryption: WEP64 / WEP128 / TKIP / AESTransmitting Power: 802.11b: +20dBm (maximum) 802.11g: +18dBm (maximum) 802.11n: +15dBm (maximum)Rx Sensitive 802.11b: -89dBm 802.11g: -81dBm 802.11n: -71dBm