... supports 802.11b/g protocol, frequency 2.4GHZ, the wireless distance can be 100 meters without block 2. powerful ... 20dbm/54M),supports 802.11b/g/n protocol, frequency 2.4GHZ, maximum power 800mw, wireless range up to 300 meters ... option)Built-inWiFi (chargeable option)Support 802.11g/b wireless networkCommunicationEmail / FTPSerial portOne RS485 interface, support transparent serial ...